Question

Question 9

What is a tonoplast?

(a) Outer membrane of mitochondria

(b) Inner membrane of chloroplast

(c) Membrane boundary of the vacuole of plant cells

(d) Cell membrane of a plant cell

Answer 1

(c) Tonoplast in plant cell the vacuole by a single membrane called tonoplast. The tonoplast facilities the transport of ions and their material against the concentration gradient into the vacuole. Hence, their concentration is higher in the vacuole than in the cytoplasm.

The outer membrane of mitochondria is formed of porin proteins and inner membrane bounds of chloroplast the stroma.

The cell membrane of the plant cell is not a tonoplast. It is simple biological/unit membrane present in every cellular organism.