Biology 1A - Lecture 12: Photosynthesis-the light reactions.

[Rooseveltboh]

I learned so much, I had to speed up the video lol... now u know u were learing , when ur understanding 2 the point where u need to fast foward

[Rooseveltboh]

The picture presentation was perfect... was given seperate, instead of my bio. teacher who gave us a full vie lol all at once... she was like color/ this, wtf???

[Rooseveltboh]

Thank you.. i watched all 3 vids... perfect A on my bio test :)

You explained it so muh better than my bioligy teacher..she did it good too lol

Thanks

[nootgis]

IAM FIVE AND I KNOW ALL THE STEPS OF TEH CALVIN CYCLE

GAWSH, COLLEGE KIDS, UR SO STOOPID

[MrCmon113]

@nootgis Now you only have to find out, how to turn caps lock off. : D

[jboychyn]

every piece of carbon in your body has been generated through photosynthetic carboxylation. Without photosynthesis no one would be here...

[mohabbat66]

i like the way she pronouns oxygen

[hematitecrow]

Wait is it just me or did she make a mistake? She just said that green light is the most important for photosynthesis? Green light isnt even used by chlorophyll how the hell is it important. Someone please reply this. Im studying for a test

[ButterflyTearsOfDark]

@hematitecrow Yeah, green light is reflected, not used.

[probassangler31]

In university are all profs this nice or are they mostly assholes?

[ArthwrH3nry]

i'm 13 and still in 8th grade and i have studied this to the biology competition

[sarebear248]

Im a freshman in highschool and we are learning this! wooowww

[BigRy123]

@sarebear248 holy your a freakin rockstar. keep up the stellar comments. 

[marklvrd]

@sarebear248 yea college basics are mainly just a repeat of what you learned in high school they just go into a more depth on certian things.

[NmHman127Nugget]

so what kind of light does cannabis absorb? I'm pretty sure thats the only reason anyone studies plants anyone,-

Is it just me or should all college be done on youtube?

[bluntley420]

@NmHman127Nugget Same light. 

[MrEksaben]

@NmHman127Nugget You're mentally retarded, right?

[NorthForkFisherman]

@NmHman127Nugget It's a useful tool, but the labs might be a bit more difficult to accomplish. ;-) This series is a great review for the class I just finished. Wish I had known of it prior to my finals. Ah well, can't have everything.

[draznitelka]

what university is teaching that/? :) she is btw really good, i was a bit confused on the whole photosynthesis topic but she definitely can explain well!!! :)

[AkshXP]

At around 43:45 when she was talking about how carotenoids protect the chlorophyll or ultimatley the DNA, couldn't that have something to do with cancer?she said it damage DNA and basically excessive reproduction of cells is because are faulty genes. Where I'm getting at is that wouldnt the exessive light, in humans, have something to do with damage to DNA. Because we dont have something like caretonoids present in our skin cells.

[carnival121]

@AkshXP

Indeed light, especially UV light does degrade our DNA in our skin cells. WHich is why sunbeds are bad for you and why high exposure to sunlight can cause types of skin cancer. However humans do have natural compunds and pathways to repair and protect DNA. One big one is melanocytes in our skin which contain melanin a pigment that sorta helps absord high energy light . Cartenoids are really important for plants because the forcibly epose their cells to high energy light. V intresting :)

[The88Nomad]

@AkshXP we have MELANIN..well, people with dark skin colour have a good presence of melanin. That's why all the people living on the Equator have a lot of melanin in their skin (because the sun is intense there), and are thus tanned or brown.

[rachellehall1]

im learning this stuff in year 12 biology..... is this at university/collage?

[Evaldas521]

@rachellehall1

I'm 17 and I'm in the 11 grade and we are learning this ;)

[XOXOshortiXOXO]

@Evaldas521 Im 14 and in 9th grade and we are learning this

[Evaldas521]

@XOXOshortiXOXO

No, you're NOT. I'm sure it's just a topic about photosynthesis, not reaction mechanisms and etc. I'm sure you're just told that it's just a way for plants to make glucose, and emit oxygen, but you're definitely not told what ribulose bifosphate, ribulose bifosphate carboxylase and NADPH is. You probably won't be even told that there are two steps: light reactions and the Calvin's cycle.

[bluntley420]

no but she does do a better job than my proffessor does. We actually use the same slides and the same textbook. My proff, she just basicly reads from the slides. If i ever question anything she never knows the answer!

[bluntley420]

Chlorophyll, more like BORE ophyll!

[fahrenheit10101010]

@bluntley420 The first thing that comes to my mind when I read your article is this:

Why did you spend your precious time typing PHOTOSYNTHESIS in the search bar,if you think it is boring ? xD

[shakagenghis]

@bluntley420

HA!!!! Great movie.

[ananiasacts]

Why can't we engineer chloroplasts for ourselves? Even if they only generated a small fraction of the energy we need it still seems like way to save energy.

[AkshXP]

@ananiasacts

thats what i was wondering! imagine being autotrophs.. the sun is ALL you need.

[lMsoCOOL]

great teacher! :)

[admathewos]

Thank you so much for posting this lecture

Addis

[jasonthai677]

u lost me at photosynthesis

[Trouterr]

@jasonthai677 lmao