Question

The number of polypeptide chains in hemoglobin is:

• A. 4
• B. 6
• C. 1
• D. 2

Hint:

Hemoglobin: tetramer (4 subunits).
2 \(\alpha\)-chains and 2 \(\beta\)-chains.
Each chain has a heme group.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Hemoglobin is a protein with a quaternary structure.
It consists of multiple polypeptide chains.

Step 2: Key Formula or Approach:
No specific formula.
Need to know the structure of hemoglobin.

Step 3: Detailed Explanation:
Hemoglobin is a tetramer.
It consists of four polypeptide chains.
In adult hemoglobin (HbA), it has two \(\alpha\)-chains and two \(\beta\)-chains.
Thus, the number of polypeptide chains is 4.

Step 4: Final Answer:
Hemoglobin has 4 polypeptide chains.
Hence, the correct option is (A).