Provide definitions/explanations for the following terms:
$(i)$ Nucleic acid
$(ii)$ Peptide bond

(N/A) $(i)$ Nucleic acids are macromolecules formed by the polymerization of nucleotides. Each nucleotide consists of three components: a nitrogenous base (heterocyclic compound),a pentose sugar (monosaccharide),and a phosphoric acid group.
$(ii)$ $A$ peptide bond is a chemical bond formed between the carboxyl group $(-COOH)$ of one amino acid and the amino group $(-NH_2)$ of the adjacent amino acid. This linkage occurs through a dehydration synthesis process,where a molecule of water is eliminated.