From the statements given below choose the correct option:

Question

From the statements given below choose the correct option:

A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S.

B. Each ribosome has two sub-units.

C. The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S.

D. The two sub-units of 80S ribosome are 60S and 20S and that of 70S are 50S and 20S.

E. The two sub-units of 80S are 60S and 30S and that of 70S are 50S and 30S.

1. A. A, B, C are true (Correct answer)
2. B. A, B, D are true
3. C. A, B, E are true
4. D. B, D, E are true

Correct Answer

Option A — A, B, C are true

Detailed Solution & Explanation

The correct answer is A, B, C are true.

Key Points

• Eukaryotic ribosomes are 80S, prokaryotic are 70S (A true), and each ribosome has two sub-units (B true).
• The 80S ribosome has 60S + 40S sub-units and the 70S has 50S + 30S sub-units (C true).
• Statements D and E give wrong sub-unit values.