Question
Biology Question on Cell: the unit of life
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
Membrane boundry of the vacuole of plant cells
Explanation
Solution
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