Question

unit 1 cumulative test (characteristics of life, biomolecules, cell structure)
23 of 42
amino acids are linked together in cells by the
○ mitochondria
○ ribosomes
○ nucleus
○ cell membrane

Explanation:

To solve this, we analyze each option:

• Mitochondria: Produce energy (ATP), not link amino acids.
• Ribosomes: Are the site of protein synthesis, where amino acids are linked via peptide bonds to form polypeptides.
• Nucleus: Contains genetic material, not involved in amino acid linking.
• Cell membrane: Regulates transport, not amino acid linkage.

Answer:

B. Ribosomes