Question

select the part whose main job is to make proteins. ribosome nucleus golgi cell membrane

Explanation:

• Ribosome: Ribosomes are the sites of protein synthesis in the cell. They read the genetic code from mRNA and assemble amino acids into polypeptide chains (proteins).
• Nucleus: The nucleus contains the cell's genetic material (DNA). While it plays a crucial role in regulating gene expression (which ultimately leads to protein production), its main function is not directly making proteins. It stores and protects DNA and controls cellular activities like growth and reproduction.
• Golgi: The Golgi apparatus modifies, sorts, and packages proteins (and lipids) that are synthesized in the endoplasmic reticulum. It does not make proteins from scratch.
• Cell membrane: The cell membrane is a protective barrier that controls the movement of substances in and out of the cell. It has no role in protein synthesis.

Answer:

Ribosome.