Question

Which one of the following structures is an organelle within an organelle?

• A. Ribosome
• B. ER
• C. Mesosome
• D. Peroxisome

Answer 1

The correct option is A

Ribosome

The correct option is A.

Explanation for the correct option:

1. Ribosomes are the location of protein synthesis in a cell is a structure, composed of both RNA and protein.
2. They manufacture amino acids and are present inside other cell organelles like mitochondria, chloroplast and endoplasmic reticulum.
3. Hence, they are referred to as organelle within an organelle.

Explanation for the incorrect options:

Option B:

1. The endoplasmic reticulum is a vast network of membranous sheets and tubes.
2. They are termed the cell's transport system because they are loaded with fluids and convey things throughout the cell.

Option C:

Convoluted membranous structures formed by plasma membrane infoldings in the pattern of vesicles, tubules, or lamellar whorls are termed mesosomes.

Option D:

1. In eukaryotic cells, there are lysosome-like organelles called Peroxisomes.
2. Toxins such as hydrogen peroxide or metabolites are removed by Peroxisomes.

Final answer: An organelle within an organelle are Ribosomes.