Question

the rough endoplasmic reticulum has ___ located on
proteins
lysosomes
cytosols
ribosomes
located within the nucleus, it is responsible for producing ribosomes
nucleolus
centrosome
endoplasmic reticulum
lysosome
which structure is directly responsible for the formation of proteins within the cell
vacuoles
ribosomes
centrioles
lysosomes

Explanation:

1. The rough endoplasmic reticulum is studded with ribosomes, which give it its "rough" appearance.
2. The nucleolus, located within the nucleus, synthesizes ribosomal RNA and assembles ribosomes.
3. Ribosomes are the sites of protein - synthesis in the cell.

Answer:

1. D. Ribosomes
2. A. Nucleolus
3. B. Ribosomes