Answer:
A. They function within the nucleus.
Step-by-step explanation:
Ribosomes are tiny particles found in both prokaryotic and eukaryotic cells. In eukaryotic cells, ribosomes are found free in the cytoplasm or are attached to the surface of the rough endoplasmic reticulum. Ribosomes consist of RNA and proteins and are synthesized by the nucleolus. Each ribosome has two main components: a large subunit and a small subunit.
Ribosomes contain the enzyme which is required to form peptide bonds between amino acids for protein synthesis. Therefore, ribosomes function in the cytoplasm and on the surface of the rough endoplasmic reticulum. They do not perform protein synthesis in the nucleus.