Question

_____________ is absent in nucleoside.

• A. Phosphate
• B. Sugar
• C. Both (A) and (B)
• D. Nitrogen base

Answer 1

Answer:

A. Phosphate

• A nucleoside is composed of two components:

1. A nitrogenous base (adenine, guanine, cytosine, uracil, or thymine)

2. A five-carbon sugar (ribose or deoxyribose)

• Phosphate group is absent in a nucleoside. However, when a phosphate group is attached to a nucleoside, it forms a nucleotide.