Question

multiple choice question
which of these cell - building molecules is made by linking amino acids together?
proteins
carbohydrates
nucleic acids
lipids

Explanation:

To determine the correct answer, we analyze the structure of each molecule:

• Proteins: Are polymers made by linking amino acids through peptide bonds.
• Carbohydrates: Are made of sugar monomers (like glucose) linked together.
• Nucleic acids: Are made of nucleotide monomers.
• Lipids: Are not polymers made of amino acids; they have a different structure (e.g., fatty acids and glycerol for triglycerides).

Since the question asks for the molecule made by linking amino acids, the correct answer is Proteins.

Answer:

A. Proteins