Question

Consider the following statement regarding photosynthesis and choose the correct option.
(A) ATP formation takes place during photophosphorylation.
(B) Kranz anatomy pertains to leaf.
(C) Reduction of NADP${}^{+}$ to NADPH occurs during Calvin cycle.
(D) In a chlorophyll molecule, magnesium is present in phytol tail.

• A. (A) and (B)
• B. (C) and (D)
• C. (A) and (C)
• D. (A) and (D)
• E. (B) and (C)

Answer 1

The correct option is A (A) and (B)

Photophosphorylation is the process of light driven electron transport across a membrane wherein the resultant proton electrochemical gradient is coupled to ATP synthesis. Kranz leaf anatomy refers to presence of two photosynthetic cell types namely bundle sheath (BS) cells that surround the vascular centres and mesophyll (M) cells which surround the BS cells. Ferredoxin receives electrons from PSI and reduces to NADP+ to form NADPH. This light reaction is catalyzed by the membrane-bound enzyme NADP reductase. The prophyrin ring of chlorophyll has a molecule of magnesium; not the phytol tail. Statements A and B are correct; option A is correct answer.