Question

An iron containing red protein is ..............

• A. ferredoxin
• B. cytochrome - f
• C. cytochrome b6
• D. plastocyanin

Hint:

Ferredoxin is a key protein in electron transfer, containing iron and often associated with red pigmentation.

Answer 1

The Correct Option is A

Step 1: Understanding the question.
The question is asking about an iron-containing red protein. Iron-containing proteins are essential in various biological processes, such as electron transport. Among the listed options, only ferredoxin is known for containing iron and playing a significant role in electron transfer.
Step 2: Analyzing the options.
(A) ferredoxin: Correct — Ferredoxin is an iron-containing protein that is involved in electron transfer during photosynthesis and respiration.
(B) cytochrome - f: This protein is involved in photosynthesis, but it is not iron-containing, and it doesn't have a red color.
(C) cytochrome b6: Cytochrome b6 is a part of the electron transport chain but is not red and does not contain iron in the same context as ferredoxin.
(D) plastocyanin: Plastocyanin contains copper, not iron, and it is not the red protein being referred to in the question.
Step 3: Conclusion.
The correct answer is (A) ferredoxin, as it is the iron-containing red protein involved in electron transfer.