First slide

Prokaryotic Cells

Question

Statement A: In prokaryotic cell, ribosomes are associated with plasma membrane.
Statement B: The sub-units of of prokaryotic ribosomes are 50S and 20S that together form 70S ribosomes.

Easy

A

Both statements A and B are incorrect.
B

Statement A is correct and B is incorrect
C

Both statements A and B are correct.
D

Statement A is incorrect and B is correct.

Solution

The 70S ribosomes of prokaryotes with subunits as 50S and 30S occur either freely in the cytoplasm or attached to inner surface of cell membrane. The ribosomes may be attached to common mRNA to form polysome or polyribosome or ergosome.

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