Question

which of the following best describes the structure of dna?
a. an amino acid chain formed from a sequence of three nucleotides
b. a molecule formed from twenty - three pairs of chromosomes
c. a polymer formed from linked subunits of four kinds of nitrogenous bases
d. a protein formed from a chain of twenty possible amino acids

Explanation:

DNA is a polymer made up of nucleotides. Each nucleotide contains one of four nitrogen - containing bases (adenine, thymine, guanine, cytosine). These nucleotides are linked together to form the DNA molecule. Option A describes the relationship between nucleotides and amino acids in translation. Option B is about chromosomes which are made of DNA and proteins. Option D describes a protein, not DNA.

Answer:

C. a polymer formed from linked subunits of four kinds of nitrogenous bases