C-4 Photosynthesis

[xo1tom1ox]

so does the o2 just got back out of the cell since it isn't used? thanks!

[soumyasayujya]

didnt u do vedios on plant anatomy like u said??....whr r they??...cant find them!! :( :( ;(

[LaxSKOOTx21]

@soumyasayujya I was just looking for that too!

[soumyasayujya]

@LaxSKOOTx21 i've found a new site go and type... BIOLOGY IB lectures eveything abt plants taught very nicely!!....hopin u wil find it useful :)

[soumyasayujya]

wow!!.....u r awesum!!...thanku!!

[metaitachi]

Wow c74 literally made no sense in my textbook but you explained it so eloquently (most importantly, you explained the original problem).

[Mjhond]

I am very happy to see the vidoe after you give this C-4 Photosynthesis: How some plants avoid photorespiration

[Ondelendo]

I Love The Video It Can Increase My Knowledge C-4 Photosynthesis: How some plants avoid photorespiration

[anakmudajaman]

Steady I Really Like This Video C-4 Photosynthesis: How some plants avoid photorespiration

[bebeheuy]

Good, I like that you share this video, I wish success always C-4 Photosynthesis: How some plants avoid photorespiration

[imegatrone]

Nice Video That You Share , So Very Nice Thanks You C-4 Photosynthesis: How some plants avoid photorespiration

[willamricard]

I Really Like The Video From Your C-4 Photosynthesis: How some plants avoid photorespiration

[bundawartini]

Your Video Is Very Useful Sharing C-4 Photosynthesis: How some plants avoid photorespiration

[benzoarz]

this finally makes me understand ty

[ovechkin651]

I wish I could like this video more than once!

[yxhsdau]

excellent!

[baabaa33]

Wonderful!!!!!

[nomanissafe]

Thi is crap, get a textbook and learn the traditional way

[itsdojoson]

@nomanissafe I used to learn from a textbook but then i took an arrow to the knee

[baabaa33]

@itsdojoson LOOOOOOOOOL, how did i know that was coming.

[itsdojoson]

@baabaa33 someone had to do it lol

[jeweliekimchi]

What I heard in AP Bio class yesterday: "blahblahblahplasmodesmatapepd­ljflksdjflne"

What I hear now: "This goes into the bundle sheath cells through plasmodesmata, so that the original Calvin Cycle can take place without any interruptions of oxygen."

*BOWS DOWN* Thank you for teaching us. Thank you so much! Thank you is not even enough. You need to get an award or something.

[NGerardS1996]

AAAAAAMMMMMMMAAAAAAAZZZZZZZIII­IIIINNNNNNNNNGGGGGGGGGG

[emceefocus]

please come to my high school and replace our current ap bio teacher..

[namrata27rocks]

thanks....it was very helpful! :)

[gigi550725]

I would've failed my Grade 12 bio if you weren't there.

[daltonwpigman]

Baller status! Thanks Khan. Yardfrazzle must have a pretty h-core high school bio.

[LiftMyEyes121]

PLASMODESMATA!! *dun dun dunnnn* ...lolz.



[conjaro]

Been watching all these videos for cell resp to now, absolutely amazing! Going into my U1 bio midterm 2 confident! Big help, even for intro university courses. Some not quite in depth required for those, but all very close and very good info! Thanks!!

[JJLOL360]

I LOVE YOU. btw what program are you using to write that all in?

[jonjonjon1370]

@JJLOL360 he uses smooth draw 3

[Ibahz]

thanks dr. khan

[86sebasmb]

woow dude your amazing.. thank you so much.

[jelena1331]

You are my hero!

Thank you so very much!

[Amanita65]

Thank you!!! :D

[MrAndrewbrahe]

explaining science doesn't get much better than this. boo ya

[thisisnotapaul]

@djdead, just simplify to 1 RuBP (5C). That molecule will break down into 1 phosphoglycerate (which is a 3 C molecule) and 1 phosphoglycolate (which is a 2 C molecule). Once we do that, we can consider greater numbers. You are right though, 3 RuBP will actually yield 3 phosphoglycerates and 3 phosphoglycolates, not 5 & 5 (which would be 25C). If you watch the Photorespiration video, the numbers will make sense in terms of what he was originally trying to do.

[indaimanda]

can't thank you enough!

[mtp0430]

Thank you sooooo much you saved my life :D

God bless you

[djdead204]

surely this is impossible. RuBP has 5 carbons. times 3 this makes 15. there is no carbon in Oxygen. how can you then make 5 (3-phosphoglycerates) which have 3 carbons so 3 times 5 is 15 carbons. all carbons are used up! how can you then make 5 2-carbon phosphoglycolates. CARBON COUNT DOESNT ADD UP!!!.

please reply. doesnt have to be Khan just some random really cool carbon counter will do.

[lindt9800]

VERY helpful thank u sooo much :)

[godzillalowzisern]

Thank you, its really helpful:)

[cpowel2]

Awesome video along with my book like every website as well as my teacher fail to mention the calvin cycle takes place in the bundle sheath cells away from oxygen and this is how C-4 plants skirt photorespiration

[Silv3rblood]

Im a First year in South Africa, and u have no idea how much you are helping me and alot of the people i know to study!

Thanks so so much!!

[beshoyui]

Plasmodesmata = horror movie

hhhhhhhhhhhhhhhhhhhhhhhh that's hilarious, u made me laugh hard~~

[ankit383]

AP Bio, I could get a 10 on any photosynthesis essay now!

[hahs4]

wow, I didn't even attend this in class and I understood it perfectly, I don't even need to read the book.Sal, thanks for getting me through bio. I love you

[gabyb999]

Thanks, this helps a lot!

[123aniruddhsiddh]

thanks this 's ameazing good

[jasonphan90]

fucking legend man!

[Mg42yang]

where's the video before this?

[5mumia]

i love your videos, even more, they are free, thank you very much i really appreciate the great job you do... and i wonder how is possible that you know soo much of biology and biochemistry....

it really helps me understand the things that didnt make sense to me at all, cos i am first grade university so it is hard for me...

greetings from Slovakia

[paggi93]

but where does PEP come 4m? ur really awesome sir..........thank you!

[2002mitchell]

You have a way of explaining potentially overwhelming and confusing topics into clear and informative pieces of art. I appreciate that you take the time to make these videos. Thank you!

[2002mitchell]

You have a way of explaining potentially overwhelming and confusing topics into clear and informative pieces of art. I appreciate that you take the time to make these videos. Thank you!

[Yardfrazzle]

You're actually THE most helpfull dude on the internet in terms of gr 12 Bio

[Niecee44]

@Yardfrazzle in terms of first year uni bio.

[denissymbolic]

HOW ABOUT A VIDEO ON THE C2 OXIDATIVE PHOTOSYNTHETIC CARBON CYCLE?

[dimseeeen]

arigatou

[cassiesmum]

ALL hail King Sal..you have helped me understand the most difficult parts of my biology lessons I salute you sir and I am humbled to know , that each of your lessons are free, thank you.!!

[cjdrummer12]

being in high school forced to learn thi in ap biology has helped me alot!!1 thank you very much

[Marasinhaz]

this is amazing!!! and thank you sooooooooooooooooooooooooooooo­ooooooo much.

i could understand everything very clearly and beautifully about c4 photosynthesis,

thanks againg. please do more and more vedeos like this.

this is excellent'

i'm a sri lankan student

[Marasinhaz]

this is amazing!!!



[greenmyrdinn]

THANKS !!!! That's wonderfull. I'm a french student and i used to understand nothing to vegtal physiollogy, but thanks to you, now I do ! ;)

A lot of blessing to you !

[thamin40]

Thanks a lot Mr. S.Khan I really appericiate the videos you have and would like to know how I can support your organization. It made it so much clear after hearing you out few times. Thanks again Raza

8568899149

[drrobhatch]

While this video is a good introduction to C-4 photosynthesis it is not as strong as the respiration videos. This video incorrectly says that there is very little or no oxygen in the bundle sheath cells, and only CO2, therefore RuBisCO is more efficient. Better to focus on the low [CO2] in mesophyll cells and high [CO2] in bundle sheath cells.

[philster00700]

Absolutely Brilliant! Thanks for helping me understand.

[breddy901121]

thank you

[Leonar12345]

you saved my life and thank you for labeling everything so i can look at it again later

[bbkanga00531]

Same thing with your Photorespiration video. How does 3 RuBP (total of 15 carbons), turned into 5 phosphoglycerate"3 carbon molecule" and 5 phosphoglycolate"2 carbon molecule" (total of 25 carbons)?

[star4galaxy]

@bbkanga00531 we're not using RuBP here, it's PEP. And please don't take me wrong, but seems like you didn't understand the process that well.

step 1: 3RuBP in c-3 plants x5 = 15 carbons

+ 3 CO2 molecules = 3 carbons

total of 18 carbons

step 2: make 6x 3-carbon chain PGA = 18 carbons (same as above)

step 3: 6 of 3-carbon PGA + 6 ATPs + 6NADPH ---> 6 G3P (still 3-carbon in each molecule so 6x3 = 18 carbons)

step 4: ...

[star4galaxy]

@bbkanga00531

step 4: 1 G3P will be taken out and will be known as PGAL (3 carbon)

remaining 5x 3-carboned G3P = 15 carbons

step 5: 5 x 3 carbon G3P + 3ATPs ----> 3 x 5-carbon RuBP (total of 15 carbon -- and what we started with)

Hope this makes sense

[samuelnguyen777]

Thanks! Great presentation!

[d1ppsy]

This is wonderful! Thank you.

[rodol21fo]

I have a presentation.. and this is a very tricky teacher, u kno, he gets questions from everything. THIS helped alot man, thnx keep it up

[nathalie2348]

Your videos have really helped me in studying for my BIO LEC exam! THANK YOU VERY MUCH!!!!!!

[aakashPotter]

Awesome video! THis is the third video of yours that I am watching. Very well explained.

[rungprae1876]

thank you :)

[icantpronounceit]

wish my lecturer was as good as you. this has really helped. thanks

[stevenEatsCats]

@icantpronounceit i concur.

[mark80242001]

Thx, i get it now

[MiguelBourke]

you are awesome. Keep doin what you're doin

[Shirlsz13]

good stuff, really helpfull :)

[burek1212]

thanks, that helped a lot, just one thing...in the beginning of the video, when you showed the photorespiration process, shouldn't you get 3 molecules of 3-phosphoglycerate and 3 molecules of phosphoglycolate from 3 molecules of RuBP?

[annieg1234567]

i dont think you understand how helpful you are to me and my brain :)

[Baby2217]

Why can't you be my lecturer? You make difficult concepts so easy to understand! I wish I bumped into your videos sooner..

You are a really good teacher and what's best is you share your resources for free. May God bless you and your family. :)

[crazyheart001]

thanks for the video, it's really helpful!

[TheJunkieBox]

Can you release a video on how to make C4 explosives?