Question

What is the main structural protein that forms the capsid of a virus?

• A. Glycoprotein
• B. Capsomere
• C. Nucleoprotein
• D. Lipoprotein

Hint:

Capsid = Made of capsomeres → Protein units forming viral coat.

Answer 1

The Correct Option is B

Concept: Viruses consist of genetic material enclosed within a protein coat called the capsid. The capsid protects the viral genome and aids in infection.
Step 1: Understanding capsid structure.
The capsid is made up of repeating protein subunits.
Step 2: Identifying the structural unit.
These subunits are called capsomeres, which assemble to form the complete capsid.
Step 3: Function of capsomeres.

• Provide structural stability
• Protect viral nucleic acid
• Determine shape of the virus

Step 4: Eliminating other options.

• Glycoproteins: Found in viral envelopes
• Nucleoproteins: Associated with nucleic acids
• Lipoproteins: Present in envelopes, not capsid

Step 5: Conclusion.
Thus, capsomeres are the main structural protein units forming the viral capsid.