Question

what makes up a nucleotide?
a a sugar
b a phosphate group
c a nitrogen - containing base
d all of the above

Explanation:

A nucleotide is the basic building block of nucleic acids (DNA and RNA). Its structure consists of three core components: a 5-carbon sugar (deoxyribose in DNA, ribose in RNA), a phosphate group, and a nitrogen-containing base (e.g., adenine, guanine). All three parts are required to form a nucleotide.

Answer:

d. All of the above