Question

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

Explanation:

To solve this, we analyze each option:

• Proteins: Amino acids are the monomers (building blocks) that link via peptide bonds to form proteins.
• Carbohydrates: Made from monosaccharides (like glucose) linked together, not amino acids.
• Nucleic acids: Made from nucleotides (e.g., DNA from deoxyribonucleotides), not amino acids.
• Lipids: Not formed by linking monomers in a repeating chain like the others; they have a different structure and are not made from amino acids.

So the molecule made by linking amino acids is proteins.

Answer:

A. Proteins