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September 16, 2025, 09:40:21 am

Author Topic: In regards to Photosynthesis ;)  (Read 1695 times)  Share 

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sillysmile

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In regards to Photosynthesis ;)
« on: March 20, 2010, 11:21:58 pm »
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Okay correct me if i am wrong.  :D
The first stage of photosynthesis is called the light dependant reactions. (or is it stage?)
(is it true that only guard cells are involved with this?)
This takes place within the grana which is found inside chloroplasts,
specifically there are chlorophylls a and b, plus carotenoids located inside the grana which absorb
the radiant light energy of red and blue wavelengths..
Using this absorbed radiant energy the *grana area*? breaks down(catabolises) 6 carbon dioxide(CO2) molecules and 12 water(H2O) molecules. These processes are exergonic, with the released energy used to resynthesize atp molecules from adp and pi which is an anabolic and an endergonic reaction.  :-\

Afterwards the second stage of photosynthesis occurs,
which is known as the light independant stage(/reactions?) (a.k.a calvin cycle)
and occurs in the stroma within chloroplast organelles.
During this stage the newly resynthesized atp(from the light dependant stage) is broken down into adp and pi in a catabolic and exergonic reaction, which releases energy and is then used to build the remnants of the 6 carbon dioxide(CO2) molecules and 12 water(H2O) molecules into a single glucose molecule, ([C6 H12 O6] which is used to fuel cellular respiration?) 6 oxygen molecules ([O2] which is released as a waste product into the atmosphere?) and 6 water molecules ([H2O] which is used for additional photosynthesis reactions?)...  :o

The overall equation for photosynthesis is
6CO2 + 12 H20 --> 1 C6H12O6 + 6O2 + 6H2O  :-\

Hahaha, ;D so have i made any mistakes?
Am i right in suggesting carbon dioxide is absorbed from the atmosphere and catabolised in the light dependant reactions and that oxygen is released into the atmosphere in the light independant reactions?


corrections would be much appreciated,
thanks for the help :)
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lexitu

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Re: In regards to Photosynthesis ;)
« Reply #1 on: March 20, 2010, 11:37:37 pm »
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Check Douchy's forum, I posted there :)

stonecold

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Re: In regards to Photosynthesis ;)
« Reply #2 on: March 21, 2010, 05:58:51 pm »
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do we need to know the complexities that are in the biozone book....

i.e.substrate level phosphorylation and oxidative phosphorylation, and the acetyl CoA stuff?
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akira88

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Re: In regards to Photosynthesis ;)
« Reply #3 on: March 21, 2010, 06:08:58 pm »
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do we need to know the complexities that are in the biozone book....

i.e.substrate level phosphorylation and oxidative phosphorylation, and the acetyl CoA stuff?
Doubt that you would have to go in such depth... perhaps go check the VCAA website and see what needs to be covered :P (I actually might do that right now)
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stonecold

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Re: In regards to Photosynthesis ;)
« Reply #4 on: March 21, 2010, 06:20:54 pm »
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there's a whopping amount of detail there, it says:

energy transformations, main stages in and sites of photosynthesis and cellular respiration; ATP-ADP cycle; factors affecting rate of energy transformations.

i guess we will be okay...
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akira88

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Re: In regards to Photosynthesis ;)
« Reply #5 on: March 21, 2010, 08:16:05 pm »
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there's a whopping amount of detail there, it says:

energy transformations, main stages in and sites of photosynthesis and cellular respiration; ATP-ADP cycle; factors affecting rate of energy transformations.

i guess we will be okay...
I reckon we would be :) Don't think the content is hard, it's jsut the application of it =.=
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simpak

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Re: In regards to Photosynthesis ;)
« Reply #6 on: March 24, 2010, 10:28:05 pm »
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Yeah you don't need massive specifics, just the phases are good enough, where they occur, that ATP is produced and used and the carrier molecules.
SIMPLE STUFF LIKE THAT.
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