NEET · Biology · STD 11 - 8. Cell the unit of life

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 .

A \(\mathrm{A}, \mathrm{B}, \mathrm{C}\) are true
B \(\mathrm{A}, \mathrm{B}, \mathrm{D}\) are true
C \(\mathrm{A}, \mathrm{B}, \mathrm{E}\) are true
D \(B, D, E\) are true

Verified Solution

Answer & Solution

Correct Answer

(A) \(\mathrm{A}, \mathrm{B}, \mathrm{C}\) are true

Step-by-step Solution

Detailed explanation

The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S type.
Each ribosome has two sub-units.
The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S .

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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