Amino acids are bound together by a chemical bond known as an amino acid bond to form proteins. a) trueb) false

False

Explanation:

Amino acids are held together by a bond called a peptide bond and not an amino acid bond. A peptide bond is a form of covalent bond that links two amino acids. This is also known as an amide bond. In the making of proteins, peptide bonds link the carboxyl group of one amino acid to the amino group of another.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

i think the answer is b.