Answer:
Ribosome
Explanation:
Ribosomes are the protein builders of a cell. Most of them are free in the cytosol, but some are bound to the endoplasmic reticulum.
A. Nucleus is wrong. The nucleus stores the cell’s DNA and coordinates its activities.
B. Mitochondrion is wrong. The mitochondria provide energy to the organism through cellular respiration.
D. Lysosome is wrong. Lysosomes are involved in the digestion and removal of wastes from the cell.
