Structure and Composition of Prokaryotic Ribosomes

What is the structure and composition of prokaryotic ribosomes?

a. Prokaryotic ribosomes consist of two subunits: small and large, made up of proteins and RNA.

b. Are prokaryotic ribosomes smaller than eukaryotic ribosomes?

c. Do prokaryotic ribosomes only found in eukaryotic cells?

d. Do prokaryotic ribosomes contain only RNA and no proteins?

Answers:

a. Prokaryotic ribosomes consist of two subunits, small and large, made up of proteins and RNA.

b. Yes, prokaryotic ribosomes are smaller than eukaryotic ribosomes.

c. No, prokaryotic ribosomes are not found in eukaryotic cells.

d. Prokaryotic ribosomes contain both RNA and proteins.

Explanation:

The prokaryotic ribosome is the structure responsible for protein synthesis in prokaryotic cells. It consists of two subunits: a small 30S subunit and a large 50S subunit, which combine to form a 70S ribosome. The small subunit contains RNA molecules called ribosomal RNA (rRNA) and proteins, while the large subunit also contains rRNA and proteins.

Prokaryotic ribosomes are smaller than eukaryotic ribosomes in terms of size and molecular weight. They are typically composed of about 40 different proteins and multiple rRNA molecules.

Unlike the statement in option c, prokaryotic ribosomes are not found in eukaryotic cells. Eukaryotic cells have their own ribosomes, which are larger and structured differently from prokaryotic ribosomes.