Question

Tonoplast is the membrane surrounding the:

• A. (a) Cytoplasm
• B. (b) Vacuole
• C. (c) Nucleus
• D. (d) Mitochondria

Answer 1

The correct option is B

(b) Vacuole

The correct option is (b)

Explanation of the correct option

1. A cell can have membrane bound organelles and non-membrane bound organelles.
2. Membrane bound organelles are mitochondria, endoplasmic reticulum, vacuoles, lysosomes, Golgi apparatus, plastids.
3. Membrane which occurs around the vacuole is called as tonoplast and separates the contents of the vacuole from the cytoplasm.

Explanation of the incorrect option

Option (a) Cytoplasm is the fluid matrix inside the cell and is enclosed by plasma membrane.
Option (c) Nucleus is a double membrane bound organelle in the cell. Its membranes are known as outer and inner nuclear membrane.

Option (d) Mitochondria has an outer membrane and an infolded inner membrane called cristae.

Final answer

Tonoplast is the membrane surrounding the vacuole.