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 protein formed from a chain of twenty possible amino acids
C.
a polymer formed from linked subunits of four kinds of nitrogenous bases
D.
a molecule formed from twenty-three pairs of chromosomes

Answer 1

b. is correct option

Answer 2

DNA is made up of molecules called nucleotides. ... If you think of the double helix structure as a ladder, the phosphate and sugar molecules would be the sides, while the bases would be the rungs. The bases on one strand pair with the bases on another strand: adenine pairs with thymine, and guanine pairs with cytosine