Question

The mitochondrial DNA differs from the nuclear DNA because of

• A. Being linear
• B. Having A = T and C $\equiv$ G
• C. Lack of binding histones
• D. Being highly twisted

Answer 1

Answer: (C)

Lack of binding histones

Difference between the nuclear DNA and the mitochondrial DNA are as follows :

1. Nuclear DNA is double stranded and linear whereas mitochondrial DNA is double stranded and circular.

2. Nuclear DNA is enveloped by nuclear membrane whereas mitochondrial DNA is not enveloped by the membrane.

3. Nuclear DNA codes for all the proteins required for its function whereas mitochondrial DNA is a semi-autonomous organelle.

4. Nuclear DNA has tight binding of histones while mitochondrial DNA do not possess such binding.

So, the correct answer is 'Lack of binding histones'