Question

which macromolecule has the following properties:

• has carbon, hydrogen, oxygen, and nitrogen
• examples are hemoglobin, keratin (your hair), and muscle

cellulose
glucose
phospholipid
sucrose
nucleic acid
protein

Explanation:

Proteins contain C, H, O, N. Hemoglobin, keratin, muscle are proteins. Others don't match all criteria.

Answer:

protein