Answer :

The specific shape of the DNA is known as a double helix. So the correct option is D.

What is the shape of DNA?

The DNA or deoxyribonucleic acid is the genetic molecule present in all organisms that carry the genetic information. This information is present in the form of codes which are transcribed and translated to carry out functions.

DNA is made of two strands. The strands are linked to each other through the base pairing of the nitrogen bases of nucleotides. The nucleotides are linked to other nucleotides by hydrogen bonds.

Adenine bonds to thymine by two hydrogen bonds and guanine binds to cytosine by three hydrogen bonds. The two strands are twisted and winded around each other.

This gives rise to a double helix structure.

Therefore the correct option is D.

Read more about the double helix, here

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