Question

The main arena of various activities of a cell is:

• A. Plasma Membrane
• B. Mitochondrion
• C. Cytoplasm
• D. Nucleus

Answer 1

The correct option is C

Cytoplasm

The correct option is C:

Explanation of the correct option:

Option C:

1. The cytoplasm is a part of the cell (protoplasm), excluding the nucleus and plasma membrane.
2. Various cell organelles are embedded in the cytoplasm, each performing various functions.
3. Respiration occurs in the cytoplasm.

Explanation of the incorrect option:

Option A:

1. A plasma membrane is a semi-permeable membrane that allows some substances to pass through it.
2. It does not regulate the activities of the cell.

Option B:

1. The mitochondrion is a cell organelle that produces energy because of which it is known as the powerhouse of the cell.
2. Krebs cycle (conversion of pyruvate to acetyl CoA) takes place in the mitochondrial matrix.

Option D:

The nucleus contains genetic material that carries hereditary information.

Final answer: The main arena of various activities of a cell is Cytoplasm.