JAMB - Biology (2025 - No. 73)
A repeating unit of a very large DNA molecule is made up of
phosphate
nitrogenous base
nucleotides
deoxyribose sugar
คำอธิบาย
DNA is a very large molecule (a polymer) made up of repeating smaller units called nucleotides. Each nucleotide in a DNA molecule consists of three components:
- A phosphate group.
- A deoxyribose sugar (a pentose sugar).
- One of four nitrogenous bases (adenine, guanine, cytosine, or thymine).