C-4 Photosynthesis

C-4 Photosynthesis: How some plants avoid photorespiration

[uhmareikuh]

Amazing how one teacher can effectively reach so many students. God bless Khan Academy.

[aymanmansoor]

At 2:23 3 rubp attach with 3 o2 to give 3 3-phosphoglycerate and 3 -phosphoglycolate

[hahs]

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

[tialicious]

You're great! I had an Plant physiology exam recently, where one of the questions was to explain the differences between C-3 and C-4 photosynthesis. Fortunately I watched you videos before, cause I knew everything - I wrote down everything you told and even made the same sketches you made in these videos:D I did it great, I received an A!;) So thank you very much for making videos like these and making every topic so interesting and understandable!;)

[gabe]

My textbook speaks martian. Thank you for actually speaking english in your videos! Thank you for actually being understandable.

[fleshcookie]

lol "everything we've been doing is biochemistry so its nice to see a leaf" - Sal-ism # 46. This dude slays me 3:40

[CrimePaysButBotanyDoesnt]

So essentially this is the way for the pep to "filter out" the oxygen and move ONLY the CO2 to the bundle sheath cells where it can be fixed by Rubisco in an oxygen-free environment

[nuradriana]

my exam is coming soon and ive no idea to express how thankful i am for this video. God bless!

[rodolfo]

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

[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 !

[louisn]

YOU ARE THE MAN!! So easy to understand compare to the textbook. Anyone who's taking biology and watching all your videos should be getting at least a "B".

Hands down the BEST biology teacher right here!!

If I had professors like you in engineering. I would be getting "A's" in most of my courses.
Thank you for the videos!!

[kaischutte]

Got a biology teacher who really doesnt care about our grades, this video make it really simple to understand, thanks for posting this video!

[dejabadejabas]

Spatial Separation from O2: In C4 Plants, CO2 fixation to PEP Carboxylase occurs in a different cell, the Mesophyll Cell. The Calvin Cycle occurs in the Bundle Sheath Cells.
Temporal Separation from O2: In CAM Plants, CO2 fixation to organic acids occurs at night. During the day, with stomata closed, the Calvin Cycle occurs in the same cell with the CO2 released from the organic acids.

[ivonas]

You are an excellent lecturer. Great explanation of complicated process. Thank you very much.

[swayamparida]

omg it is 11years old but the use of digital board and the clear explanation can make fall in love with bio. Thank you khan academy😍 p.s.:2021

[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.!!

[ritajasaha]

Thank you so very much. The explanation is excellent. And it is amazing how you can use the computer monitor as a virtual blackboard.

[suriasanasini]

dulu ada budak cakap, cikgu dia macam sampah, sekarang lepas tengok video ini, aku berani cakap cikgu aku lori sampah ! tahniah kepada khan academy yang mampu memberi tunjuk ajar yang sangat hebat !! i am a malaysian

[weebleapplesmooooo]

2:35 it should be three 3-phosphoglycerate and three phosphoglycolate, not five of each

[lionprincess]

German high school student here. It is amazing how this is easier in English than in German :D