Question

Which of the following is true about the structure of DNA?

• A. It is composed of two strands of nucleotides that are held together by hydrogen bonds.
• B. It is composed of four strands of nucleotides.
• C. It is made up of amino acids linked together by peptide bonds.
• D. It consists of a single strand of nucleotides.

Hint:

DNA's double-helix structure is a key feature that allows it to store genetic information and replicate accurately during cell division.

Answer 1

The Correct Option is A

DNA (Deoxyribonucleic acid) is a double-stranded molecule composed of two long chains of nucleotides. These chains run in opposite directions and are held together by hydrogen bonds between complementary nitrogenous bases: adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). The two strands form a double helix structure, which is the signature feature of DNA. Thus, DNA is composed of two strands of nucleotides that are held together by hydrogen bonds.