Thanks for the vid!!! You helped me score an A on my chem test, and now your helping me with anatomy! honestly you explain everything in a clear and slow manner, and i believe your ways of teaching is very affective. THanks again
It’s amazing to think that just a 3-billion in number amount of information – 01231032… – can describe everything about what we are. Literally just information, which is tantamount to saying literally just math, can describe everything that makes us, us. This, to me, is far profounder than being created out of dust, or a clot of blood, or by any other means purported by any other creation myth.
Sal you are a legend!!! Do you know something about everything? I have watched your videos for chemistry, biology & physics!! Thank you so much. I couldn't have passed my courses without you :)
This sentence doesnt make sense. it is found at 21:34. All the genes dont make proteins but all the proteins are made by genes? I dont understand this.
@HaloReachGravHammer Lemme see if i can help... What he probably means is that within DNA not every single gene sequence will code for proteins(amino chains) but every protein that is within our body is made from genes
@HaloReachGravHammer proteins are made by genes, but some genes don't code at all, some are non coding areas of DNA. So you may need 5 genes to code for a polypeptide chain,, but in-between you will have sections that don't code for anything
This is a truely amazing piece of work put together into this video... I'm attending a sort of high-school with the branch-specification bionics. I'm doing a introductery project about DNA and genes and this has absolutely gotten me into this! Thanks so much! Love from Austria! :)
Thanks soooooo much for a great video ! I have tried for such a long time to understand what the difference between alleles and genes was, and if it coded for other proteins or what ever ! Finally i get the idea and concept behind this !
Thanks for helping a non-scientist to start to understand a very interesting subject. Now I can persevere with reading Life's Solution by Simon Conway Morris!
Dude, you made it totally clear to me in half an hour and I got the highest mark in class while my teacher apperently took 7(!) weeks to deal with this... And still no-one knew what she was on about...
I was reading the updated version of 'The Origin of Species' by Steve Jones and he said that the Fruit Fly were prone to variation and mutation more so that other species. Is this because of their large number of base pairs? So the more larger the dna the more probability there is of genetic reshuffles occuring?
You are a great teacher, definitely gifted. Most people are able to explain things so that only people who already understand it can follow but you know how to make it translate to those of us learning.
I have a question, I have been wondering what happens to Uracil and have not been able to find a good answer that I am able to understand. Does uracil cause the mRNA to translate into protein, and is uracil ever changed back into thymine after the molecule is a protein? Thank you.
and yes i'm completely aware of my unnecessary use of comma splices before the word and as well as my misuse of the word, "better". I'm a physicist not a writer.
it really pisses me off when people act like they're better than other people because of their ability to speak and write a language better than other people. If you have no better ideas than them, and the only thing you can feel superior about is your grammar, then maybe they're smarter than you. It's a big world, lots of languages. If we can't get ideas across language barriers, and are too arrogant to accept other people's ideas despite their lack of periods, then America's going to crash.
WTF... this is science and religion has nothing to do with this...it's like as if you're talking about a shoe and then a fruit or sth...religion may wanna answer fer questions but that is juz bullshit..the real answer is here *science*
Wonderful video. I wonder if you could do one more detailed, like describing the actual protein synthesis, with all of the different types of RNA and enzymes and stuff like that. Or maybe some recent things such as gene repression, pseudo genes, etc.
In the end of this video when you talk about all life on the planet having the commonality of DNA is why sadly I can't imagine the universe flourishing with life. In other words, if life "happens" so readily, by now we would have found more than one example of life on this planet's 4+ billion year history. If life can take place in the so-called Goldilocks Zone as stated by many biologists, why haven't we found more than one example? Just makes life the more special and profoundly bizarre
@ritesh024 What is CS? Communication? I also wonder how this guy knows so much! He's covered virtually every scientific subject: Chemistry, Physics, Math, Biology, he's covered it! I wish this guy would give a bit of backround regarding his education because he's extremely bright!
The basis of your statement is far from logical. If you imply one can only master a subject in which they have a degree, you have a lot of reading to do, particularly in history. People liked your comment only because you praised Sal in an unusual way.
The basis of your statement is far from logical. If you imply one can only master a subject in which they have a degree, you have a lot of reading to do, particularly in history. People liked your comment only because you praised Sal in an unusual way.
your video explanation is a great help for me, although i learned this during my high school, i have trouble in explaining this to my students for now by just reading some textbooks... it's my first year of teaching and i don't want that my students will fail to understand the lesson... their failure reflects mine... thank you so much... how i wish you also have video lesson in Physics...
If you are a truth seeker, search "Truth Contest" in Google and click on the 1st result, then open The Present and read what it says. Everyone needs to see this. The Present will turn this world right-side up if it reaches enough people. You will see what I mean when you read the first page.
@excsa62 I am Muslim too, but unlike you I actually follow what Islam says and am HUMBLE and don't show arrogance. Many Christians, Muslims, many people of many different religions are smart. You're a jerk.
@MonaRocks09 Not as any as you would think in the Arab world. People who are intelligent and had the misfortune of being indoctrinated into Islam stop following that dumbass religion and move to somewhere civilized.
@MonaRocks09 No, I'll think I'll stay. It's quite an interesting video and I hadn't finished it in my first sitting. What was wrong with my comment? My grammar may not be perfect but there was nothing major wrong with it and everything was spelled right. The Muslim religion is disgusting and immoral along with most organised religions. Maybe you don't realize this because you're an American and they don't teach what's really in religious texts in western countries.
@klm4298 LOL whatever dude, some illiterate person on the internet isn't worth my time, get a life, keep replying...which I know you will since you have nothing better to do...but I am done. Enjoy yourself
Thanks so much for this! I am in year 12 and because of illnees I've only been to about three bio classes this term and exams are next week! This is a life saver :)
I just wanted to thank you, I have a Intregrated Science test for college and when i noticed portions of DNA (which i had no clue about) I searched youtube and found this presentation, Very good and valid information. P.S. Im going to college for a BBS Human Resources Management (Why I have to know about DNA I have no idea of). Thanks again, I have watched this video twice and your presented it so well im sure its stuck in my head until the test!
It would be good if you could also talk about the different mutations that can occur during the replication process and what what causes these mutations. But this was a really great video and it helped me a lot, thank you.
WAit so it's almost like DNA is alive or something... weird. What propels DNA to be transcribed into MRNA? How does it know what to do? I'm so full of QUESTIONS hahaha
this is a fantastic video and all and i love sal he has taught me all of my math videos to but if he said that he got all of this info on wikipedia then why do you have to watch this video?? dont get me wrong sal is a great teacher and he is a great role model to me but if he said that he got all of this info on wikipedia then i suggest that you go there
@1000theoperasinger You have no idea how much I appreciate hearing that. It bug's me SO MUCH when people reference Wikipedia as an academic source. In this context, I have no issue with pictures from Wikipedia, just the information written on there.
Do you know how long I have been trying to understand this! You are awesome! You should win a Nobel peace prize because your videos help peeps make peace with their scalps... you know from all the scratching and hair pulling from trying to understand stuff...!!! Really, you are doing the world a service! Thanks so much! I can only hope I can contribute as much through my volunteer work!
I have been forwarding links to his site to my friends on facebook, and asking them to pass along to any students in their lives. Great thing to do. Spread the ability to learn, change the world!
Hey khan, i know you get a lot of messages on youtube and you probably don't read them all, but, if you do read this, can u make a more complex version of DNA structure and all?
i am going ever where i can warning others about doctors that care little if any about their patients and what we went throw because of to of these doctors
I always love your videos! However, I am concerned about your over simplification of the process of Translation. You did not include a ribosome at all in the process, and made it seem as though the tRNAs line up next to each other on the mRNA strand, causing the polypeptide to form, which is not quite how it truly happens.
@camronjstanley I think what he has here is a pretty good start. For an introduction to translation, I would not want to overwhelm students with concepts like the peptidyl-tRNA binding site and the aminoacyl-tRNA complex binding site. I think the particulars of any concept are always easier to understand once you've got a basic understanding of that concept.
I always love your videos! However, I am concerned about your over simplification of the process of Translation. You did not include a ribosome at all in the process, and made it seem as though the tRNAs line up next to each other on the mRNA strand, causing the polypeptide to form, which is not quite how it truly happens.
I'm still waiting for a logical explanation on how DNA and an RNA Polymerase ribosome exist and function coherently through evolution......... Can ANYBODY explain it??
@silentonall and H20z1 "I can't think of how two particular kinds of molecules might have come about to be the language of life, and none of the entry-level biology students who are watching this video will tell me, so all life must have been created by a trans-dimensional, omnipotent, omniscient intelligence who somehow couldn't create a system of life that wasn't laughably inefficient and cumbersome." Nice "logic." Really, though, wikipedia has like four plausible theories on abiogenesis.
This is, without any doubt, the BEST and most useful channel on youtube. EVERYONE should be subscribed to you, and everyone should watch your videos...these are the types of video that should be "most viewed" on youtube. Its just amazing how easy it is to learn stuff from you... what i would learn in 1-2 hours from a book, i learn in 20 mins from one of your videos. Excellent! Thank you so much!
Your videos are so helpful!! My teacher knows what he's talking about, he just doesn't know how to teach it and therefore I don't understand. But in your videos i do. Thanks! :)
Your videos are so helpful!! My teacher knows what he's talking about, he just doesn't know how to teach it and therefore I don't understand But in your videos i do. Thanks! :)
Traditionally there are 20 amino acids (imagine 20 alphabetical letters) and from these amino acids when combined in a specific sequence they make different kinds of proteins, such as when letters are combined they make different kinds of words. Lately however, there has been introduced 2 more amino acids to the amino acid family, which makes it 22.However, the universal amino acids found in proteins are 20, the rest are either found in eukaryotes or prokaryotes or may be nonproteinogenic.
when mRNA and other proteins can come out through the nuclear pore and many nuclear specific protein can enter from cytosol to nucleus then why DNA can not come out of nuclear pore?
I'm pretty sure that you just saved my parents like 200 dollars a week on a tutor. Thanks bro.
nchoopsboy 5 days ago
Thanks for the vid!!! You helped me score an A on my chem test, and now your helping me with anatomy! honestly you explain everything in a clear and slow manner, and i believe your ways of teaching is very affective. THanks again
eagcentral 1 week ago
It’s amazing to think that just a 3-billion in number amount of information – 01231032… – can describe everything about what we are. Literally just information, which is tantamount to saying literally just math, can describe everything that makes us, us. This, to me, is far profounder than being created out of dust, or a clot of blood, or by any other means purported by any other creation myth.
MarvelsofaLifetime 1 week ago
PLEASE DO A VIDEO ON PROTEIN SYNTHESIS!!!!!!!!!!!!!
mig3535 1 week ago 2
like a boss!
ojay747 2 weeks ago
Sal you are a legend!!! Do you know something about everything? I have watched your videos for chemistry, biology & physics!! Thank you so much. I couldn't have passed my courses without you :)
1983Skibum 2 weeks ago
This sentence doesnt make sense. it is found at 21:34. All the genes dont make proteins but all the proteins are made by genes? I dont understand this.
HaloReachGravHammer 3 weeks ago
@HaloReachGravHammer Lemme see if i can help... What he probably means is that within DNA not every single gene sequence will code for proteins(amino chains) but every protein that is within our body is made from genes
starboy020396 3 weeks ago
@HaloReachGravHammer He's just saying that not ALL genes make proteins, but ALL proteins are made by genes.
Shalek 3 weeks ago
@HaloReachGravHammer proteins are made by genes, but some genes don't code at all, some are non coding areas of DNA. So you may need 5 genes to code for a polypeptide chain,, but in-between you will have sections that don't code for anything
Dunclr 3 weeks ago
Comment removed
dmcarefuldriver 4 weeks ago
@15:40 those sets of 3 bases on the tRNA are anticodons, right?
dmcarefuldriver 4 weeks ago
This is a truely amazing piece of work put together into this video... I'm attending a sort of high-school with the branch-specification bionics. I'm doing a introductery project about DNA and genes and this has absolutely gotten me into this! Thanks so much! Love from Austria! :)
DrSCHNO 1 month ago
HOLY SHIT! I GET IT NOW!
ohmangkhoa 1 month ago 2
08:42 it's a Palindrom
xxTaKe2xx 1 month ago
hiiiii
AkshayAmazing 1 month ago
i lol when he stutters
JuanLikesRice 1 month ago
you teach better than my biology teacher..i literally just watch all your videos before my tests and it helps more than enough.. thank you <3
warf13579 1 month ago
amazing!!!!
jillbuckton 1 month ago
u r just awesome,sir!!!!
someone20ify 1 month ago
Thanks soooooo much for a great video ! I have tried for such a long time to understand what the difference between alleles and genes was, and if it coded for other proteins or what ever ! Finally i get the idea and concept behind this !
JONESH99 1 month ago
Thanks for helping a non-scientist to start to understand a very interesting subject. Now I can persevere with reading Life's Solution by Simon Conway Morris!
halimaali 1 month ago
Dude, you made it totally clear to me in half an hour and I got the highest mark in class while my teacher apperently took 7(!) weeks to deal with this... And still no-one knew what she was on about...
Thanks!
From the netherlands ;)
daafskedus 1 month ago
Made the second highest score on the biology semester exam, couldn't have done it with out you.
AznAlacran 1 month ago
It's funny how he easily gets distracted with all the side information. Great video, though!
TheNonoybubbles 1 month ago
hoolly fuuck
MediumNothinFull 1 month ago
7:33 a.a.a.a.
MediumNothinFull 1 month ago
hahahaha man i love you
MediumNothinFull 1 month ago
I just saved 350 dollars plus a 400 dollar book on a class to learn about DNA! Welcome to the future.
KRSchannel 1 month ago
I love this. Im in a very hard bio class as a freshman. We go into greater detail but this really put everything together for me. THANK YOU
thebeastofderek 2 months ago 10
I thought this vid was about but the top comment is about religion. LOL.
princessazula777 2 months ago
2:24 "if you have something good to say, it shouldn't take you that long to say it..."
*looks at the video length, 28 minutes... -_-
FitnessWithTroy 2 months ago
@FitnessWithTroy I think as far as explaining DNA, 30 minutes is pretty good.
padlockd 2 months ago
@padlockd lol i know, i was kidding
FitnessWithTroy 2 months ago
@FitnessWithTroy at least say Thanks ^__^ !
ossamasoft 2 months ago
@FitnessWithTroy
Well, he didn't just say something good he told you a bunch of smart things ;)
Froschritter 2 months ago
I'm glad I found this, it'll make this next unit in Biology so much easier :'D
EmilyLightning 2 months ago
I was reading the updated version of 'The Origin of Species' by Steve Jones and he said that the Fruit Fly were prone to variation and mutation more so that other species. Is this because of their large number of base pairs? So the more larger the dna the more probability there is of genetic reshuffles occuring?
theprofitablehobo955 2 months ago
Late show
perchsmith 2 months ago
You are a great teacher, definitely gifted. Most people are able to explain things so that only people who already understand it can follow but you know how to make it translate to those of us learning.
itsmattgw 3 months ago
This has been flagged as spam show
This is great for learning, some of his videos are on my teacher's website!
But I'd like to point out that the and and and and error at 1:50.
lol
ThCursed0ne 3 months ago
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ThCursed0ne 3 months ago
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ThCursed0ne 3 months ago
I am (trying) to learn this in Biology class right now. Now I understand. Thanks!
starwarsfreakgeek 3 months ago
SubhanAllah (Glory be to God) only Allah could have created something so intricate and complicated!
pinkrose101s 3 months ago 2
@pinkrose101s
It's not complicated when you understand it.
teawead 2 months ago
@pinkrose101s allah sucks
KingDcome11 2 weeks ago
I have a question, I have been wondering what happens to Uracil and have not been able to find a good answer that I am able to understand. Does uracil cause the mRNA to translate into protein, and is uracil ever changed back into thymine after the molecule is a protein? Thank you.
crynicab 3 months ago
excellent teaching... thanks khanA
manjunathvenkatpati 3 months ago
and yes i'm completely aware of my unnecessary use of comma splices before the word and as well as my misuse of the word, "better". I'm a physicist not a writer.
actlikeimclever 3 months ago
it really pisses me off when people act like they're better than other people because of their ability to speak and write a language better than other people. If you have no better ideas than them, and the only thing you can feel superior about is your grammar, then maybe they're smarter than you. It's a big world, lots of languages. If we can't get ideas across language barriers, and are too arrogant to accept other people's ideas despite their lack of periods, then America's going to crash.
actlikeimclever 3 months ago
they hold Stoutishpayloads
stoutishpayload 3 months ago
WTF... this is science and religion has nothing to do with this...it's like as if you're talking about a shoe and then a fruit or sth...religion may wanna answer fer questions but that is juz bullshit..the real answer is here *science*
stupid
temkauulee1205 3 months ago
CAN you please do a video on protein synthesis with mrna, trna, and rrna??? pLEASE?
cheezeydude 3 months ago 29
my teacher sent me here. im glad she did to because i actually get it:) thanks
ZAbest234 3 months ago
Great lecture. Thank you, Mr.Sal.
fortyeightsix 4 months ago
BTW! you are amazing mashallah you are incredibly talented :)
ingleward 4 months ago
Salman! You should make history videos! and English videos such as on books and interpretation! HISTORY! would help a lot! i love the subject!
ingleward 4 months ago
This is AMAZING
rbiker22 4 months ago
i needed this i was soooooooooooooo lost
s2ehello 4 months ago
thanks a lot
megsstenhouse 4 months ago
This has been flagged as spam show
..you knoww, me and that roach! that i'd not like to be in the same room with..uh we share the same common root!
hahaha wonderful sense of humor! great teacher sal is, the best ive known so far :)
omar2819 4 months ago
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omar2819 4 months ago
Yo dawg i heard you like viruses so we put their dna in your dna so you can transcribe them while you translate you!
Ryosuke1208 4 months ago
i actually get transcription after two years!! ( yr 12 and first yr science!)
ameneteid 4 months ago
Wonderful video. I wonder if you could do one more detailed, like describing the actual protein synthesis, with all of the different types of RNA and enzymes and stuff like that. Or maybe some recent things such as gene repression, pseudo genes, etc.
PanndaKat 4 months ago
In the end of this video when you talk about all life on the planet having the commonality of DNA is why sadly I can't imagine the universe flourishing with life. In other words, if life "happens" so readily, by now we would have found more than one example of life on this planet's 4+ billion year history. If life can take place in the so-called Goldilocks Zone as stated by many biologists, why haven't we found more than one example? Just makes life the more special and profoundly bizarre
HigherPlanes 4 months ago
@HigherPlanes we have but it's been supresseed
ploy3snoy 4 months ago
@ploy3snoy Ha! I forgot about that possibility.
HigherPlanes 4 months ago
i am in love. you guys are geniuses and i wish i had yall's brain lol thank you so much, this helps alot!
pingpongdiddlydong 4 months ago
You have a degree in Maths and CS. You are not supposed to know so much about Biology.
ritesh024 4 months ago 75
@ritesh024 What is CS? Communication? I also wonder how this guy knows so much! He's covered virtually every scientific subject: Chemistry, Physics, Math, Biology, he's covered it! I wish this guy would give a bit of backround regarding his education because he's extremely bright!
southoreast 2 months ago
@ritesh024
The basis of your statement is far from logical. If you imply one can only master a subject in which they have a degree, you have a lot of reading to do, particularly in history. People liked your comment only because you praised Sal in an unusual way.
Like my comment if you agree!!
jumb0mumb0 2 months ago in playlist Biology
This has been flagged as spam show
@ritesh024
The basis of your statement is far from logical. If you imply one can only master a subject in which they have a degree, you have a lot of reading to do, particularly in history. People liked your comment only because you praised Sal in an unusual way.
Like my comment if you agree!!
jumb0mumb0 2 months ago in playlist Biology
@ritesh024 THATS RIGHT WOAH FACK A RUNE
mrxai658 2 months ago
"for those of you who lile to.....lift weights"
extremeAgile 4 months ago
Intense. This helped me a lot; thank you!
fufufuyen 4 months ago
2:17
The irony being that this is Khan's longest video.
hedonism13 4 months ago 13
how can some 1 dislike this video
he is giving away free tutoring
Mast3rSpectra 5 months ago 4
The LORD watches Khan
nervousystem79 5 months ago
This has been flagged as spam show
By The Word of The LORD The Heavens were made and all The host of them by the breath of his mouth ( Psalm 36:6 )
armyofchrist100 5 months ago
@armyofchrist100
^^^^Religion pigeon
Doesn't understand science lesson on DNA
Quotes bible verse.
toocaran1 4 months ago
@armyofchrist100 Please leave with your religious nonsensical drivel.
SargentLimpDick 4 months ago
thank uuuuuuuuuuu finally i understand what allele means exactly
ozma1408 5 months ago
mind = blown
Slayermachete 5 months ago
your video explanation is a great help for me, although i learned this during my high school, i have trouble in explaining this to my students for now by just reading some textbooks... it's my first year of teaching and i don't want that my students will fail to understand the lesson... their failure reflects mine... thank you so much... how i wish you also have video lesson in Physics...
firefly83sparrow 5 months ago
This has been flagged as spam show
If you are a truth seeker, search "Truth Contest" in Google and click on the 1st result, then open The Present and read what it says. Everyone needs to see this. The Present will turn this world right-side up if it reaches enough people. You will see what I mean when you read the first page.
vividDC 5 months ago
This has been flagged as spam show
@vividDC I really wish you people would gtfo
SargentLimpDick 4 months ago
7 people hate... oh wait, I'm not an asshole
someonetoogoodforyou 6 months ago 3
@someonetoogoodforyou Thank you! so tired of that shit
richjamesmclean 6 months ago
i love those names!
laprechaun12 6 months ago
This has been flagged as spam show
Mr khan is muslim and now i'm proud of being a Muslim.....this proves Muslims are smarter than stupid christians
excsa62 6 months ago
@excsa62 humble too..... jerk
yayyaayyy 6 months ago
@excsa62 this is rather insulting :(
BoomBASticXman 6 months ago
@excsa62 Khan has never revealed what his personal faith is. So you're wrong.
Drgamedood 6 months ago
@excsa62 I am Muslim too, but unlike you I actually follow what Islam says and am HUMBLE and don't show arrogance. Many Christians, Muslims, many people of many different religions are smart. You're a jerk.
MonaRocks09 6 months ago 30
@MonaRocks09 Lol yup!
GollaGandaLova 4 months ago
@MonaRocks09 Not as any as you would think in the Arab world. People who are intelligent and had the misfortune of being indoctrinated into Islam stop following that dumbass religion and move to somewhere civilized.
klm4298 3 months ago
@klm4298 Please don't speak of intelligence when you can't even form a proper sentence. Get the fuck out.
MonaRocks09 3 months ago
@MonaRocks09 No, I'll think I'll stay. It's quite an interesting video and I hadn't finished it in my first sitting. What was wrong with my comment? My grammar may not be perfect but there was nothing major wrong with it and everything was spelled right. The Muslim religion is disgusting and immoral along with most organised religions. Maybe you don't realize this because you're an American and they don't teach what's really in religious texts in western countries.
klm4298 3 months ago
@klm4298 chill out lmao
flamesword321 3 months ago
@flamesword321 I didn't express any anger in either of my comments.
klm4298 3 months ago
@klm4298 LOL whatever dude, some illiterate person on the internet isn't worth my time, get a life, keep replying...which I know you will since you have nothing better to do...but I am done. Enjoy yourself
MonaRocks09 3 months ago
@MonaRocks09 umad bro?
TheTdwpforever 3 months ago
@excsa62 How do you know he's a muslim? I think he's way too smart to follow any religion.
Ladylyla 6 months ago in playlist Virus Khan Academy
@excsa62 Is that what Islam taught you? Intolerance? And you are proud of that?
missypunkrocker 3 months ago
Mr Khan has saved my butt so many times with his videos, can never thank him enough. THANK YOU GOOD SIR! God bless you and your family.
MonaRocks09 6 months ago 2
fml i should just become an english major
MonaRocks09 6 months ago
Thanks so much for this! I am in year 12 and because of illnees I've only been to about three bio classes this term and exams are next week! This is a life saver :)
MsRauu 6 months ago 2
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MsRauu 6 months ago
Comment removed
MsRauu 6 months ago
I just wanted to thank you, I have a Intregrated Science test for college and when i noticed portions of DNA (which i had no clue about) I searched youtube and found this presentation, Very good and valid information. P.S. Im going to college for a BBS Human Resources Management (Why I have to know about DNA I have no idea of). Thanks again, I have watched this video twice and your presented it so well im sure its stuck in my head until the test!
notomelodious 6 months ago
wow...a lot of smart people spend 100 of dollars on expencive presentation software
not you...you use paint :D
pghg022 6 months ago
Awesome !
damngirlz21 6 months ago
This guy is utterly negronious. I love it.
WHIREAS 6 months ago
YOU ARE UNBELIEVABLY AWESOME!
Niecee44 6 months ago
like it
TheAmbitious10 6 months ago in playlist Biology
"if you have anything good to say, it shouldn't take you that long to say it" - can you please say that to my english teacher?
iniloy1993 7 months ago in playlist Biology 3
So much knowledge packed into such a short video. This is why Khan Academy is such a great place to learn.
bftjosh 7 months ago
It would be good if you could also talk about the different mutations that can occur during the replication process and what what causes these mutations. But this was a really great video and it helped me a lot, thank you.
SheHerGirl 7 months ago
this channel is the BEST, I really, really like this
whooooooaaaaaa 7 months ago
WAit so it's almost like DNA is alive or something... weird. What propels DNA to be transcribed into MRNA? How does it know what to do? I'm so full of QUESTIONS hahaha
maxwellpassion 7 months ago
You're so freakin smart!
maxwellpassion 7 months ago
this is a fantastic video and all and i love sal he has taught me all of my math videos to but if he said that he got all of this info on wikipedia then why do you have to watch this video?? dont get me wrong sal is a great teacher and he is a great role model to me but if he said that he got all of this info on wikipedia then i suggest that you go there
SchoolofMNRock 7 months ago
I found this by searching for bref dna saenihp
34103070674978532046 7 months ago
The excellent lessons by Khan would be even more awesome if they included computer graphics like in this YouTube video: /watch?v=4PKjF7OumYo
SirTubelot 7 months ago 2
This has been flagged as spam show
i get it now :-)
azb0111 8 months ago
this is by far the most simplified version of something so difficult..thank you soo much
9112sweet 8 months ago 5
wikipedia isn't accurate -.-
1000theoperasinger 8 months ago 4
@1000theoperasinger You have no idea how much I appreciate hearing that. It bug's me SO MUCH when people reference Wikipedia as an academic source. In this context, I have no issue with pictures from Wikipedia, just the information written on there.
BladesOfMunch 7 months ago
I could almost see David's star in the centre of the last enzyme on the right.
Just8eatit 8 months ago
What about "Junk" DNA?
RichtoffenRoach 8 months ago
Do you know how long I have been trying to understand this! You are awesome! You should win a Nobel peace prize because your videos help peeps make peace with their scalps... you know from all the scratching and hair pulling from trying to understand stuff...!!! Really, you are doing the world a service! Thanks so much! I can only hope I can contribute as much through my volunteer work!
chomie3 8 months ago 5
how can you write so neatly
?
and btw wats a strand of dna?
bon0058 8 months ago 2
This has been flagged as spam show
I have been forwarding links to his site to my friends on facebook, and asking them to pass along to any students in their lives. Great thing to do. Spread the ability to learn, change the world!
justicekev 8 months ago
Thumbs up if you thought of the AUG gun when you saw the anticodon
Ibahz 9 months ago 3
@Ibahz Me too! It was inevitable
RichtoffenRoach 8 months ago
"We all have DNA, as different as that roach that I might not like to be in the same room with" - hahah
RawrJohnT 9 months ago
Comment removed
RawrJohnT 9 months ago
I think we all love you
DeMiiiiii12 9 months ago
I got lost after the amino-acids... :(
greenrive 9 months ago
thks!
JpJangz 9 months ago
I totally get it with a few repeats of some parts...Thank you!!!!
kwdonkor 9 months ago
jealous mutants
socoto85 9 months ago
Hey khan, i know you get a lot of messages on youtube and you probably don't read them all, but, if you do read this, can u make a more complex version of DNA structure and all?
DarkSwanz 9 months ago
Khan, you forget about gene separator
dumbass6380 9 months ago
thank you.
CBalltheway 9 months ago
why cant u be my teacher :[ ?
TheKrakatoa1 9 months ago
i am going ever where i can warning others about doctors that care little if any about their patients and what we went throw because of to of these doctors
MsBones1950 10 months ago
I always love your videos! However, I am concerned about your over simplification of the process of Translation. You did not include a ribosome at all in the process, and made it seem as though the tRNAs line up next to each other on the mRNA strand, causing the polypeptide to form, which is not quite how it truly happens.
camronjstanley 10 months ago
@camronjstanley I think what he has here is a pretty good start. For an introduction to translation, I would not want to overwhelm students with concepts like the peptidyl-tRNA binding site and the aminoacyl-tRNA complex binding site. I think the particulars of any concept are always easier to understand once you've got a basic understanding of that concept.
SZ720FM 10 months ago
I always love your videos! However, I am concerned about your over simplification of the process of Translation. You did not include a ribosome at all in the process, and made it seem as though the tRNAs line up next to each other on the mRNA strand, causing the polypeptide to form, which is not quite how it truly happens.
camronjstanley 10 months ago
AP exam for me tomorrow, hopefully this will save me =)
H20z1 10 months ago
I'm still waiting for a logical explanation on how DNA and an RNA Polymerase ribosome exist and function coherently through evolution......... Can ANYBODY explain it??
silentonall 10 months ago
@silentonall logic and evolution dont really go together mate
H20z1 10 months ago
@silentonall and H20z1 "I can't think of how two particular kinds of molecules might have come about to be the language of life, and none of the entry-level biology students who are watching this video will tell me, so all life must have been created by a trans-dimensional, omnipotent, omniscient intelligence who somehow couldn't create a system of life that wasn't laughably inefficient and cumbersome." Nice "logic." Really, though, wikipedia has like four plausible theories on abiogenesis.
idreamofur 10 months ago
@silentonall Read a book
SPQRomantic 9 months ago
This is, without any doubt, the BEST and most useful channel on youtube. EVERYONE should be subscribed to you, and everyone should watch your videos...these are the types of video that should be "most viewed" on youtube. Its just amazing how easy it is to learn stuff from you... what i would learn in 1-2 hours from a book, i learn in 20 mins from one of your videos. Excellent! Thank you so much!
derbigpr500 10 months ago
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Your videos are so helpful!! My teacher knows what he's talking about, he just doesn't know how to teach it and therefore I don't understand. But in your videos i do. Thanks! :)
daedae199 10 months ago
Your videos are so helpful!! My teacher knows what he's talking about, he just doesn't know how to teach it and therefore I don't understand But in your videos i do. Thanks! :)
daedae199 10 months ago 2
Forget the university, if anyone told me he had watched all of this guys videos, I'd hire him before he could say deoxyribonuclein.
Standardguttene 10 months ago
omg... I cannot learn from anyone besides you, I am bout to cry, thank you so much!
MeetHotSingles 10 months ago
thank you so much.
jhugirl28 10 months ago
thaks billions sal u are the best
kourosh41 10 months ago
Traditionally there are 20 amino acids (imagine 20 alphabetical letters) and from these amino acids when combined in a specific sequence they make different kinds of proteins, such as when letters are combined they make different kinds of words. Lately however, there has been introduced 2 more amino acids to the amino acid family, which makes it 22.However, the universal amino acids found in proteins are 20, the rest are either found in eukaryotes or prokaryotes or may be nonproteinogenic.
destinydenied1 10 months ago
If you have something good to say, it takes exactly 28:05 minutes to say it...
vijayramesh3 11 months ago 3
Please help me clarify a question :
when mRNA and other proteins can come out through the nuclear pore and many nuclear specific protein can enter from cytosol to nucleus then why DNA can not come out of nuclear pore?
malaytri1 11 months ago
@malaytri1 I think its because DNA doesnt have to come out of the nucleus, instead it just "makes" a "copy" of itself.
derbigpr500 10 months ago
If mRNA attaches itself to the DNA, what is RNA?!?!?!?!
angelakachick101 11 months ago
very helpful (: Thanks
nschmidtott 11 months ago
Khan i think you should make a video for Digestive System, thank you for your great videos
MrRamandi 11 months ago