Fundamentholfundamenthol
NEET2025Biology
Q.

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

    B, D, E are true

  2. B

    A, B, C are true

  3. C

    A, B, D are true

  4. D

    A, B, E are true

Solution

Standard ribosome facts:

  • A — True: Eukaryotes have 80S, prokaryotes have 70S ribosomes.
  • B — True: Every ribosome consists of two subunits.
  • C — True: 80S = 60S + 40S; 70S = 50S + 30S.
  • D and E — False: The subunit sizes stated are wrong.

A, B and C are true.

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