Question

question 3 of 10
what are the three groups of atoms that make up amino acids called?
a. phosphate, sugar ring, nucleotide base
b. hemoglobin, oxygen, iron
c. carboxyl group, amino group, side chain
d. carbon, hydrogen, oxygen

Explanation:

Amino acids have a common structure with a carboxyl group (-COOH), an amino group (-NH₂), and a side - chain (R - group) that varies among different amino acids. Option A lists components of nucleotides, option B lists components related to hemoglobin, and option D lists common elements in many organic compounds but not the specific groups in amino acids.

Answer:

C. Carboxyl group, amino group, side chain