Question

What is a tonoplast?

• A. Outer membrane of mitochondria
• B. Inner membrane of chloroplast
• C. Membrane boundry of the vacuole of plant cells
• D. Cell membrane of a plant cell

Answer 1

Answer: (C)

Tonoplast is a single membrane that bounds the vacuoles and separates it from cytoplasm. In plants, tonoplasts facilitate uphill transport of many ions and other materials, making their concentration higher in vacuole than cytoplasm