The following image shows a portion of an electron photomicrograph of a chloroplast - VCE - SSCE Biology - Question 18 - 2006 - Paper 1
Question 18
The following image shows a portion of an electron photomicrograph of a chloroplast.
Light-dependent reactions occur in region P and the Calvin cycle reactions occu... show full transcript
Worked Solution & Example Answer:The following image shows a portion of an electron photomicrograph of a chloroplast - VCE - SSCE Biology - Question 18 - 2006 - Paper 1
Step 1
A. oxygen is an input to reactions at P.
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Answer
This statement is incorrect. In the light-dependent reactions occurring in region P, oxygen is produced as a byproduct of water splitting, rather than being an input.
Step 2
B. carbon dioxide is an input to reactions at Q.
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Answer
This statement is correct. The Calvin cycle, which occurs in region Q, requires carbon dioxide as a key input to synthesize glucose through the fixation process.
Step 3
C. chlorophyll is essential for reactions that occur at Q.
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Answer
This statement is incorrect. While chlorophyll is crucial for light-absorbing processes in region P, it is not essential for the reactions in the Calvin cycle occurring at Q.
Step 4
D. ADP produced during the events at P is used by events at Q.
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Answer
This statement is correct. ADP is produced during the light-dependent reactions in region P and is then used as an energy carrier in the Calvin cycle at region Q.
