Question

How is nucleoid different from nucleus?

• A. Nucleoid does not show genetic material, which is present in nucleus.
• B. Nucleoid is present in eukaryotes whereas nucleus is present in prokaryotes
• C. Nucleoid is not covered by a membrane, whereas nucleus is membrane bound.
• D. Nucleoid is the other name of nucleus

Answer 1

The correct option is B

Explanation of the correct answer:

1. Nucleoid is not covered by a membrane, whereas nucleus is membrane bound.
2. Nucleoid is an irregularly-shaped region within the cell where the genetic material is not covered by a membrane, whereas nucleus is membrane bound .
3. Nucleoid is the region in prokaryotic cell where genetic material is found.
4. Nucleoid does not contain any membrane that surrounds it.

Explanation of the incorrect answers:

Option A:

1. Nucleoids generally contain a single pair of chromosomes.
2. The genetic material of the cell is very long in size and shape.
3. It undergoes supercoiling and fits within the nucleoid.

Option C:

1. Nucleoid is present in prokaryotes.

2. Nucleus is the membrane bound region in the eukaryotes containing genetic material.

Option D:

1. Nucleoid differs from the nucleus in the absence of genetic material.

2. Hence, it is different from nucleus.

Final answer: Nucleoid is not covered by a membrane, whereas nucleus is membrane bound is the difference between nucleoid and nucleus.