NEETBotanyPhotosynthesis in Higher Plants
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The term 'dark reaction' for the biosynthetic phase of photosynthesis is a misnomer. Reason (R): The biosynthetic phase does not directly depend on the presence of light but is strictly dependent on the supply of ATP and NADPH. In the light of the above statements, choose the most appropriate answe
Options
- ABoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- B(A) is correct but (R) is not correct
- CBoth (A) and (R) are correct and (R) is the correct explanation of (A)
- D(A) is not correct but (R) is correct
Correct answer
C. Both (A) and (R) are correct and (R) is the correct explanation of (A)
Step-by-step solution
The biosynthetic phase of photosynthesis is often called the dark reaction because it is not directly driven by light. However, calling it a 'dark reaction' is a misnomer because it cannot occur indefinitely in the dark. It is strictly dependent on the assimilatory power (ATP and NADPH) produced during the light reaction. Therefore, both the Assertion and the Reason are correct, and the Reason provides the correct explanation for why the term is considered a misnomer. Answer: Both (A) and (R) are correct and (R) is