Question

1. ribosomes attached to the rough endoplasmic reticulum

a. are where most polypeptides are produced.
b. are the sites of atp synthesis.
c. neutralize hydrogen peroxide and other toxic molecules.
d. are cells of the immune system unique to connective tissue.

Explanation:

Identify the function of ribosomes on the rough endoplasmic reticulum

Ribosomes attached to the rough endoplasmic reticulum (RER) are primarily responsible for synthesizing proteins (polypeptides) that are destined for insertion into membranes, packaging within lysosomes, or export from the cell.

Evaluate the given options

• Option a: Correct. Ribosomes are the cellular machinery where translation occurs to produce polypeptides.
• Option b: Incorrect. Mitochondria are the primary sites of ATP synthesis.
• Option c: Incorrect. Peroxisomes neutralize hydrogen peroxide and other toxic molecules.
• Option d: Incorrect. Ribosomes are intracellular organelles, not cells of the immune system.

Answer:

• a. are where most polypeptides are produced. (Correct answer)
• b. are the sites of ATP synthesis.
• c. neutralize hydrogen peroxide and other toxic molecules.
• d. are cells of the immune system unique to connective tissue.