試題詳解

45. Which of the following descriptions about the photosynthesis is(are) correct?
1. The assimilation of CO₂ into organic compounds (triose phosphates) in green plants takes place at equal rates in light and darkness.
2. The pathway of CO₂ assimilation has a greater energy cost in C₄ plants than in C₃ plants.
3. Photorespiration is a costly side reaction of photosynthesis. It is driven by light.
4. The light reactions in photosynthetic higher plants do not require chlorophyll.
5. Photorespiration is a costly side reaction of photosynthesis. It results from rubisco's carboxylase activity.
(A) 1 and 5.
(B) 2 and 4.
(C) 3 and 5.
(D) 2 and 3.

(E) 1 and 2.