Question

multiple-choice question
what makes proteins?
□ vacuoles
□ endoplasmic reticulum
□ ribosomes
□ mitochondria
□ nucleus

Explanation:

To determine what makes proteins, we analyze each option:

• Vacuoles: Store substances, not make proteins.
• Endoplasmic Reticulum (ER): Some ER has ribosomes (rough ER) and is involved in protein processing, but the main protein - making structure is ribosomes.
• Ribosomes: Are the cellular structures responsible for protein synthesis (translation of mRNA into proteins).
• Mitochondria: Produce energy (ATP), not proteins.
• Nucleus: Contains genetic material and controls cell activities, not directly make proteins.

Answer:

C. ribosomes (assuming the option for ribosomes is labeled as C; if the original labels were different, adjust the identifier based on the actual option numbering for "ribosomes")