Question

proteins are composed of hundreds of small molecules called _____.
amino acids
peptides
nitrogen
fiber
triglycerides are long chains of linked carbons that have a glycerol backbone and three fatty acids; they can be a component of lipids.
true
false

Explanation:

Proteins are polymers of amino - acids. Peptides are short chains of amino - acids, nitrogen is an element present in proteins, and fiber is a type of carbohydrate. Triglycerides are indeed long chains of linked carbons with a glycerol backbone and three fatty acids and are a component of lipids.

Answer:

1. A. amino acids
2. True