Which of the following is correct about Ribosomes?

Correct option is C

The correct answer is (c) Found in both eukaryotic as well as prokaryotic cells

Explanation:
• Ribosomes are unique because they are not bound by any membrane, making them present in all cell types.
• They are the cellular sites for protein synthesis, often referred to as the 'Protein Factories' of the cell.
• In prokaryotes, they are typically 70S type, while in eukaryotes, they are 80S in the cytoplasm.
• They are composed of ribosomal RNA (rRNA) and proteins.
• Apart from the cytoplasm, they are also found on the Rough Endoplasmic Reticulum (RER) and inside organelles like mitochondria and chloroplasts.

Information Booster:
• Ribosomes were first observed under an electron microscope by George Palade in 1953.
• The 'S' in 70S or 80S stands for Svedberg unit, which is a measure of the sedimentation coefficient.

Additional Knowledge:
They are membrane-bound organelles (Option a)
• This is incorrect; ribosomes are non-membrane-bound structures, unlike the nucleus or lysosomes.
Found in prokaryotic cells only (Option b)
• This is incorrect; they are vital for all living organisms to produce proteins and thus exist in both eukaryotes and prokaryotes.
Found in eukaryotic cells only (Option d)
• This is incorrect; prokaryotic cells (like bacteria) also contain ribosomes to synthesize proteins.

So the correct answer is (c)