18. What is a nucleotide composed of?
A nucleotide consists of a phosphate group (PO3), sugar (ribose or deoxyribose) and a nitrogen base (adenine, guanine, thymine, cytosine or uracil.) The following are nucleotides of DNA.
A nucleotide consists of a phosphate group (PO3), sugar (ribose or deoxyribose) and a nitrogen base (adenine, guanine, thymine, cytosine or uracil.) The following are nucleotides of DNA.