Multiple choice

The site of protein synthesis is

  1. lysosome

  2. mitochondria

  3. endoplasmic

  4. ribosome

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ribosomes are the cellular structures where protein synthesis occurs. They read mRNA and assemble amino acids into protein chains. Lysosomes break down waste materials. Mitochondria produce energy (ATP). Endoplasmic reticulum modifies proteins but the actual synthesis happens at ribosomes (which can be free or attached to the ER).

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