7
practice examMultiple Choice

Practice Exam

Question 7 • Biology

Which statement best distinguishes the light-dependent (L-D) reactions from the light-independent (L-IND) reactions?

Answer
A
The L-D reactions occur in the cytoplasm, and the L-IND reactions occur in the chloroplast.
B
The L-D reactions occur in the chloroplast, and the L-IND reactions occur in the mitochondria.
C
The L-D reactions occur in the stroma, and the L-IND reactions occur in the cytoplasm.
D
The L-D reactions occur in the thylakoid membrane, and the L-IND reactions occur in the stroma.

Explanation

The light-dependent reactions take place in the thylakoid membranes, where chlorophyll captures light energy. The light-independent reactions, also called the Calvin cycle, take place in the chloroplast’s stroma. Therefore, the statement that the L-D reactions occur in the thylakoid membrane and the L-IND reactions occur in the stroma is correct.

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