Question

1. Which of the following statements is correct?

a. Only photosystem I is involved in the noncyclic pathway.
b. Both photosystem I and photosystem II are involved in the noncyclic pathway.
c. Only photosystem II is involved in the noncyclic pathway.

2. If a photosynthetic cell is running low on NADPH, should it use the cyclic pathway or the noncyclic pathway of the light-dependent reactions?

a. Cyclic pathway
b. Noncyclic pathway

Answer 1

1-The correct statement is: Option b

2-Option a. Cyclic pathway.

Step-by-step explanation:

1- Both photosystem I and photosystem II are involved in the noncyclic pathway. Photosystem II absorbs light first and transfers electrons, which are then passed through an electron transport chain to photosystem I. Both work together in the noncyclic pathway to produce ATP and NADPH.

2-The preferable pathway in this scenario is the cyclic pathway. When the cell is low on NADPH, using the cyclic pathway allows for the continued production of ATP without the concurrent consumption of NADPH