Question

What are "Ribosomes"?

A. A small organelle, made of RNA and protein and found in both prokaryotic and eukaryotic cells, that forms proteins from amino acids
B. A storage organelle of the cell. Some vacuoles help transport food molecules across a cell membrane.
C. Structure that forms the surface of a cell separating its contents from the outside world
D. A type of cell that has a membrane-bound nucleus and membrane-bound organelles

Answer 1

Ribosomes are small organelles and sites of protein synthesis, found in both eukaryotic and prokaryotic cells. They consist of ribosomal RNA and protein, and are not surrounded by a membrane. Some ribosomes are attached to the endoplasmic reticulum or nuclear envelope.

Step-by-step explanation:

Ribosomes are small organelles and are the sites of protein synthesis (or assembly). They are made of ribosomal protein and ribosomal RNA, and are found in both eukaryotic and prokaryotic cells. Unlike other organelles, ribosomes are not surrounded by a membrane. Each ribosome has two parts, a large and a small subunit, as shown in the Figure below. The subunits are attached to one another. Ribosomes can be found alone or in groups within the cytoplasm. Some ribosomes are attached to the endoplasmic reticulum (ER), and others are attached to the nuclear envelope.