Question

Arrange the following electron acceptors of Z-scheme of photosynthesis based on the movement of electron from P680 onwards.

(A) Iron-Sulphur Proteins
(B) Ferrodoxin
(C) Plastocyanin
(D) Plastoquinones
Choose the correct answer from the options given below:

• A. (A), (B), (C), (D).
• B. (D), (C), (B), (A).
• C. (D), (A), (B), (C).
• D. (D), (C), (A), (B).

Hint:

In the Z-scheme, electrons flow in the order: P680 → Plastoquinones → Plastocyanin → Iron-Sulphur Proteins → Ferrodoxin.

Answer 1

The Correct Option is D

Step 1: Understanding the Photosynthetic Z-scheme.
The Z-scheme represents the electron transport chain in photosynthesis. Electron flow begins with the excitation of electrons in Photosystem II (P680). The sequence of electron acceptors is:\[P680 \rightarrow \text{Plastoquinones} \rightarrow \text{Plastocyanin} \rightarrow \text{Iron-Sulphur Proteins} \rightarrow \text{Ferrodoxin}\]Step 2: Conclusion.
Therefore, the correct order of electron acceptors is: \[\text{Plastoquinones} \rightarrow \text{Plastocyanin} \rightarrow \text{Iron-Sulphur Proteins} \rightarrow \text{Ferrodoxin}\]
Final Answer: \[ \boxed{\text{(D), (C), (A), (B)}} \]