During photosynthesis in chloroplasts, energy is used to split water, forming oxygen and hydrogen ions - VCE - SSCE Biology - Question 7 - 2014 - Paper 1
Question 7
During photosynthesis in chloroplasts, energy is used to split water, forming oxygen and hydrogen ions.
The splitting of water occurs
- in the stroma during the ligh... show full transcript
Worked Solution & Example Answer:During photosynthesis in chloroplasts, energy is used to split water, forming oxygen and hydrogen ions - VCE - SSCE Biology - Question 7 - 2014 - Paper 1
Step 1
in the stroma during the light-independent reaction.
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Answer
The splitting of water does not occur in the stroma during the light-independent reaction. The light-independent reactions primarily utilize ATP and NADPH produced in the light-dependent reactions.
Step 2
in the grana during the light-dependent reaction.
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Answer
The light-dependent reactions take place in the thylakoids, where water is split to provide electrons, resulting in oxygen as a byproduct. Thus, the splitting of water primarily occurs in the grana, which contain the thylakoids.
Step 3
on the membrane of the thylakoids during the light-independent reaction.
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Answer
This statement is incorrect. The thylakoid membrane is where the light-dependent reactions occur, which is when water splitting takes place.
Step 4
on the surface of the outer chloroplast membrane during the light-dependent reaction.
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Answer
This statement is incorrect. The outer chloroplast membrane does not participate in the splitting of water; this process occurs within the thylakoids during the light-dependent reactions.
