MCQ practice · SSC Biology Board questions · Chapter 4: Bioenergetics
In the amaranthus plants Nuru saw, -
- i. the rate of photosynthesis is high
- ii. the first stable substance in carbon reduction is phosphoglyceric acid
- iii. the capacity to produce glucose is high
Think it through first, then pick an option.
- a i and ii
- b i and iii
- c ii and iii
- d i, ii and iii
Answer and explanation
Correct answer: b i and iii
Amaranthus is a C4 plant: high rate of photosynthesis (i) and high glucose production (iii); ii is false.
Why the other options are wrong
- a i and ii: ii is false: in amaranthus the first stable substance is oxaloacetic acid, not phosphoglyceric acid.
- c ii and iii: ii is false: the first stable substance is not phosphoglyceric acid, and the true i is left out.
- d i, ii and iii: ii is false: phosphoglyceric acid belongs to C3, so all three cannot be correct.
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