Question

2 multiple choice 1 point the molecule shown in this diagram is: a nucleotide an amino acid a glycerol a carboxyl group

Explanation:

Amino acids have a general structure with an amino group ($-NH_2$), a carboxyl group ($-COOH$), a hydrogen atom and a side - chain attached to a central carbon atom. The given molecule has an amino group and a carboxyl group attached to a central carbon along with hydrogens, which is the basic structure of an amino acid. Nucleotides have a sugar, a phosphate and a nitrogen - containing base. Glycerol has a formula $C_3H_8O_3$ and a different structure. A carboxyl group is just $-COOH$ and not a whole molecule.

Answer:

B. An amino acid