Which statements explain the primary difference between the structure of a nucleic acid and the structure of a protein?
a. a nucleic acid has alternating base pairs. a protein has alternating peptides.
b. a nucleic acid is held together by the sugar­phosphate complex. a protein is held together by the carbon­ carbon bonds.
c. nitrogen bases form the backbone of a nucleic acid. peptides form the backbone of a protein.
d. nucleotides link together to form a nucleic acid. amino acids link together to form a protein.