STANDARD Zoology DNA Structure MCQ Question with Solution

How many nucleotides are present in one turn of DNA helix

A

4 pairs

B

8 pairs

C

10 pairs

D

9 pairs

Option C

In one turn of DNA the helix in B form DNA is 10 base pairs. A-DNA has 11 base pairs, C-DNA has 9 base pairs.

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Escherichia coli has _______, and haploid content of human DNA is _______

Assertion (A): DNA is the predominant genetic material in most organisms. | Reason (R): DNA is more chemically and structurally stable than RNA.

What is the function of tRNA in the process of translation?

Assertion (A): Euchromatin is transcriptionally active chromatin. | Reason (R): Euchromatin is more densely packed and stains dark.