DNA replication (6/10)

[MyG36E]

Wait, what about the helicase and the polymerase enzymes?

[katheryncruz24]

dislikessss likes

[edstudios]

More dislikes because the vid is wrong!

[glily2]

not a single video is helping us about the replication process....

[NamikazeHaru]

lol , is this supposed to be university level ?

seriously ?

[TheMordyS]

more dislikes than likes?? i don't understand

[gopikakrishnakrishna]

bad......suits LP students

[gopikakrishnakrishna]

bad......suits LP students

[lexinaut]

Visually effective. People who giggle a lot form a DOUBLE SQUEALIX instead of a double helix. (A little humor helps you think about really complicated information).

[Notonesingleusername]

This video is perfect! If you know your terms, this simplifies understanding :] Cool cool.

[Ben8426]

This implies a mechanism that doesn't happen by showing the nucleotides being added without any enzymes and not in order either. You really can't explain it in a meaningful way with context when you ignore all this. For a simplified view we could just state that enzymes are tiny biological machines inside cells that perform tasks, including when the cell decides to replicate, unwinding the DNA to access the code and adding nucleotides in sequential order.

[GelinafromMars]

LOL this sucks

worst video.

[mrbomplastik]

but WHO MAKES THE DNA SEPERATE??????? WHAT ABOUT ALL THE ENZYMES ETC.???????

[svetienn]

hey i agree with everyone who knows how dna replication works but my goal was to find a video so my 7th grade students can picture the process without the enzymes or anything being mentioned (they seemed confused when i brought up the word enzymes and tried to explain what helicase does :-|) so this will work for middle school students

[Xeidasx]

bitch lies!

[0Rosario0]

fucking terrible video



[InternalCorruption]

Sry but this is nowhere near right... all of the nucleotides are brought in by DNA Polymerase III, and ya, none of those enzymes are mentioned at all. Extremely misleading. This is totally misleading. Any student who is learning this should NOT learn by this video.

-Human Biology Specialist student

[alvinoboy]

this is a fail video......what happened to helicase and polymerase? i was trying to study for a ap bio exam and i clicked on this......im sorry but this is honestly not good

[TazmanianDevilDude]

This looks like the DNA model that I saw at the little kids science center

[dreamrage1]

this is the basics but not very helpful to be honest because it doesnt talk about helicase and okazaki fragments.

Please make a better vid next time =D

[DocPelletier]

Holy Crap...they have the DNA in a left-handed helix!

Why would anyone go to all the trouble to make a video about something they don't understand at all?

[justinbieberox57]

this is very wrong

[rockNrollrocks100]

THIS IS NICK!!!!!!!!!!!!!!!!!!!!!!!!!!­!!!!!!!! D

[xXcryOnXx]

not basically wrong, but basically to short. ;)

[PynkWalkr]

it's not wrong, it's just kindergarten level

[screilly]

Sooooooo Wrong

[JBD7DramaQueen]

THIS IS TOTALLY WRONG!.. well half of it....

[McTacobell808]

To everyone saying this video is too simple and not in depth enough, it is not a video for science in college, but rather for kids in elementary and high school. They are purposely making it quite simple, so younger not very advanced kids can learn the BASICS of DNA Replication, not the in depth process.

[DocPelletier]

@McTacobell808

Why teach kids the wrong stuff. I teach Bio in high school and even what is right in this is well below that level. I can see omitting some some detail for clarity in teaching elementary school. But, left-handed DNA? That's just ridiculous. It's no harder to draw it correctly.

Besides, even for kids in elementary school, leaving out the machines that do the actual work is not "simpler." It just makes it seem more magical and mysterious...which it is not.

[stullas]

That was easy to understand compared to the other ones. that was all i needed to know!!!!

[wheeliestunter]

Its magical, dont you see? It just happens that everything lines up and is in the right place at the right time!

[Coolmatt49]

If only it were that easy...

[bananenschale567]

hey i can see some cigarettes in this clip :D

[cmreker]

epic fail!

[eline239]

okay this was TOO simple

[kuschelgiirl]

das video ist schlecht! sind wir hauptschüler oder was??

[thewiseweasel]

this is the worst thing I've ever seen

[mustafahashimkhan]

this is the definition of failure

[Orion3T]

Note this video is a single part of a set of videos intended to explain DNA to someone who hasn't studied it before.

It also accompanies one of the S104 books which explains a lot more. It's not intended to explain DNA replication in detail.

There is no mention of particular enxymes here because it would overcomplicate it for an introductory video. The main point was simply to show how the base pairing and double helix can work to allow replication. It's not wrong - it's just simplified.

[lochness1202]

this is bad....

[videosniper]

grundschule?

[Petrasas1]

Ve skutečnosti je to ale o moc složitější.

[mausejule]

really bad

[gunzt3rkenfu92]

This does not help! you anger me!

[paulilolo]

waste of time

[RoialSport]

das video ist voll gammel!

[DEIFADDER]

replication for dummies , you know ... may it would be enouht for grade 6 or 7 ....

[darcflame37]

simple version

[raichushocksu]

good enough for me even tho im in 7th XD

[sexinisrael]

This is big elephant shit.

[baztiz]

soooooooooooooooo basic, someone link something complex plz

[zambazy13]

ahhhhaaa now i know the replication ^^

[Caliabra]

This does not explain ANYTHING!! gah

[OneCatholic]

I think this is meant to give a very, very basic explanation to DNA noobs.

But I have to say, the part about bases randomly floating around the cell and attaching themselves was a bit too far.

[itzsix]

weak

[LenaFeix]

there is no explanation of the process plus the enzymes are not even mentioned. WAY TOO SIMPLE AND NOTHING FOR SOMEONE WHO WANTS TO KNOW DETAILS!

[eatmcdonalds]

WAY too basic

[curriz]

brilliant

this is perfect for yr12 biology standards

thanx so much :)

[darkyglaze420]

this one blows

[LuvinJamaica]

this is VERY basic :(

[jaggedtoaster912]

this is horribly wrong. old strands don't sit around waiting for "floating" nucleotides to simply match up. no one better believe this is how it happens...

[cynitizen]

As

jaggedtoaster912 says, this video is misleading. "A double strand of DNA unwinds" make it seems like a spontaneous process, which isn't. At the body temperature, a large activation energy is required to unwind DNA; and denatured strands anneal back (think PCR).

The visual depiction is also incorrect. Nucleotides do not pair in random order to the template strand; rather, they polymerize sequentially on the 3' end of the growing strand, helped by the proof-reading ability of DNA polymerase.

[infrenis]

amazing at the end why are they curly?

[blizzified]

lol well the animation isn't that accurate. it's helical because of the hydrogen bonds between nucleotides i think. agreed with Klar. not even single strand binding protein or helicase or dna polymerase was mentioned.

[Ununennium119]

It is hydrogen bonds that hold nucleotides together.

[KLar2009]

this is basically wrong because none of the necessary enzymes are mentioned...also, no mention of directionality of the DNA replication process...FAIL

[berguzarkorel1]

@KLar2009 It's ok 4 students, who wants 2 realise who how dna copies itself.. I'm a student, too and i have 2 admit that i couldn't understand how Dna copies itself from other videos i watched..!

[flanderlin]

that was WAYYY oversimplified

[draedwillows]

This is Kindergarden stuff x_x

[betyychan]

Im pretty sure A pairs with U

C-->G

G-->c

T-->A

[perfectchaos91]

in DNA replication T always pairs with A

A pairs with U during transcription in protein synthesis where complementary RNA bases are paired with the DNA on the sense strand.

[willc2]

@perfectchaos91 Tough crowd

[krn4eva1]

pretty good to understand so far.

[estropie]

good to understand, but it is only usefull

in maybe 6class oder 7^^

[nilou101]

too simple