Functions of Chlorophyll A and B

[Joeybag]

Any one tell me what the difference is b/t these 2. Also if you know how that fits into the photosystem II and I scheme.
Thanks

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[Three-Oh]

Any one tell me what the difference is b/t these 2. Also if you know how that fits into the photosystem II and I scheme.
Thanks

chloroplasts contain pigments (chlorophyl a, b, caretenoids, etc) these pigments are responsible for absorbing photons of light that initiate the photosynthetic process. i'll do my best to explain: photosystem 1 (aka p680 - absorbs light best at this wavelenght photosystem 2 (aka p700 - absorbs light best at this wavelength) cyclic vs. non cyclic, light strikes photosystem 1 and exites electrons to a higher energy state. These electrons go through an entire process that i can't give two &$*'s to explain - but look it up. basically - the electrons go through a cyclic path or noncyclic - one makes both atp and nadph and the other only atp (i think). I think noncyclic makes both and cyclic makes only atp. Noncyclic involves photosystem 2 aswell. it's all about filling electrons that have been excited due to the splitting of water - which is the source of the oxygen that is liberated - REMEMBER that dudes experiment? the one where he disproved everyone else's in terms of where the Oxygen comes from - is it water or carbon dioxide? The correct answer was water. The carbon dioxide, is actually introduced into the dark reactions (if i recal correctly), and is reduced to form a 3 carbon sugar - right? and to produce this sugar, energy and reducing power is provided by atp and nadph respectively - right? shall i continue onto c4 and cam plants -or is that enough? i feel i'm on a role right now, but i think i should stop!

do you all think i can manage a 20 on the dat biology if i keep my studying up at this rate? any opinions?

 

[Smooth Operater]

Just wondering since you mentioned the dark rxn. Do we need to know the Calvin Cycle in depth for the DAT?

 

[Smooth Operater]

chloroplasts contain pigments (chlorophyl a, b, caretenoids, etc) these pigments are responsible for absorbing photons of light that initiate the photosynthetic process. i'll do my best to explain: photosystem 1 (aka p680 - absorbs light best at this wavelenght photosystem 2 (aka p700 - absorbs light best at this wavelength) cyclic vs. non cyclic, light strikes photosystem 1 and exites electrons to a higher energy state. These electrons go through an entire process that i can't give two &$*'s to explain - but look it up. basically - the electrons go through a cyclic path or noncyclic - one makes both atp and nadph and the other only atp (i think). I think noncyclic makes both and cyclic makes only atp. Noncyclic involves photosystem 2 aswell. it's all about filling electrons that have been excited due to the splitting of water - which is the source of the oxygen that is liberated - REMEMBER that dudes experiment? the one where he disproved everyone else's in terms of where the Oxygen comes from - is it water or carbon dioxide? The correct answer was water. The carbon dioxide, is actually introduced into the dark reactions (if i recal correctly), and is reduced to form a 3 carbon sugar - right? and to produce this sugar, energy and reducing power is provided by atp and nadph respectively - right? shall i continue onto c4 and cam plants -or is that enough? i feel i'm on a role right now, but i think i should stop!

do you all think i can manage a 20 on the dat biology if i keep my studying up at this rate? any opinions?

Also, I belive PS II is also known as P680 and PSI is known as P700.

 

[ddsnp]

For the Calvin cycle know what goes in and what comes out. Know general things. I dont' think enzymatic reactions are important.

 

[Three-Oh]

the above parody is all from memory - i had no text book while writing it - what do you all think - impressive?

 

[dat_student]

the above parody is all from memory - i had no text book while writing it - what do you all think - impressive?

I am very impressed. What school do you go to? 😱 I think you'll get 30 for biology. 😉
P.S. You made it a mistake, CORRECTION: Photosystem I (P700) - Photosystem II (P680)

 

[Three-Oh]

I am very impressed. What school do you go to? 😱 I think you'll get 30 for biology. 😉
P.S. You made it a mistake, CORRECTION: Photosystem I (P700) - Photosystem II (P680)

hey, thanks for your comments bro! but were you serious, because i was!

actually i majored in 'biochemistry with emphasis in plant biology' 😀

jk - that would be probably the most boring major any school could offer!

but all that stuff was from the top of my head - but i'm considerably weak in other areas

 

[dat_student]

hey, thanks for your comments bro! but were you serious, because i was!

actually i majored in 'biochemistry with emphasis in plant biology' 😀

jk - that would be probably the most boring major any school could offer!

but all that stuff was from the top of my head - but i'm considerably weak in other areas

I am serious. 😉 Usually, I am NOT a good predictor but I predict the following scores for you:

Bio = 30
G'Chem = 30
O'Chem = 30
QR = 30
RC = 30
AA = 30
PAT = 30

You seem to know everything that you need to know for the test. Thus, you should be able to get 30 for everything. I do not know everything. So, for myself, I predict that I'll get single digit scores.

 

[Three-Oh]

I am serious. 😉 Usually, I am NOT a good predictor but I predict the following scores for you:

Bio = 30
G'Chem = 30
O'Chem = 30
QR = 30
RC = 30
AA = 30
PAT = 30

You seem to know everything that you need to know for the test. Thus, you should be able to get 30 for everything. I do not know everything. So, for myself, I predict that I'll get single digit scores.

very flattering, but i think you've overestimated me...why do you waste your time on SDN? either you have nothing to.....i'm not wasting my time, but good luck whatever it is you have lined up!

 

[Smooth Operater]

3-Oh I am majoring in biochemistry too. Even though I feel it's a hard major and and dooze off in most of my lectures, i feel it will prepare me well for the DAT. As I am going through the kaplan book, most of biology and chemistry stuffs seem so simple excluding the ecology and evolution section.

 

[Three-Oh]

3-Oh I am majoring in biochemistry too. Even though I feel it's a hard major and and dooze off in most of my lectures, i feel it will prepare me well for the DAT. As I am going through the kaplan book, most of biology and chemistry stuffs seem so simple excluding the ecology and evolution section.

i was joking about majoring in biochemistry - i actually majored in biology - but the bio section seems very very very very easy!!!

i took a few biochem oriented courses, and i see why it is you are well prepared! good luck