Question

Which is the largest cell organelle present in a plant cell?

• A. Nucleus
• B. Chloroplast
• C. Endoplasmic reticulum
• D. Mitochondria

Answer 1

The correct option is A

Nucleus

The correct option is A.

Explanation of the correct option:

1. The largest organelle is the nucleus.
2. The eukaryotic cells have a nucleus and the genetic material is stored in the nucleus.
3. The nucleus controls all cellular functions and it is referred to be the “Control center of the cell”.
4. Protoplasm and plasma membrane make up its parts.
5. Nuclei often have a spherical or disc shape, though occasionally they might have a lobed appearance.
6. They range in size from 1 to 10 m in diameter, though they might be larger or smaller depending on the species.

Explanation of the incorrect option:

Option B:

It measures 2 micrometers thick and 10 micrometers long.

Option C:

The endoplasmic reticulum's membranes range in thickness from 5 nm to 8 nm and the SER lumen is wider than the RER lumen, which is between 20 and 30 nm broad (30-60 nm).

Option D:

Typically cylindrical or rod-shaped, plant mitochondria are 1–3 m in length and 0.5 m in diameter.

Final answer: The nucleus is the largest cell organelle present in a plant cell.