Ncert Exercises & Solutions

What is a tonoplast?

1. outer membrane of mitochondria

2. inner membrane of mitochondria

3. membrane boundary of the vacuole of plant cell

4. cell membrane of plant cell

(c)Tonoplast In plant cell the vacuole in bound by a single membrane called tonopiast.The tonoplast facilitates the transport of ions and other material against the
The tonoplast facilitates the transport of ions and other 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.

Page 134, XI NCERT

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