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What is a tonoplast ?...

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

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The correct Answer is:
C
Tonoplast is a single membrane that bounds the vacuoles and separates it from cytoplasm. In plants, tonoplasts facilitate unhill transport of many ions and other materials, making their concentration higher in vacuole than cytoplasm.
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NCERT FINGERTIPS-CELL - THE UNIT OF LIFE-Cell - The Unit Of Life
  1. Who proposed the fluid mosaic model of plasma membrane ?

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  2. Which of the following options is true for a secretory cell ?

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  3. What is a tonoplast ?

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  4. Which of the following is not true for a eukaryotic cell ?

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  5. Which of the following statements is not true for the cell membrane ?

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  6. Plastids differ from mitochondria on the basis of which of the followi...

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  7. Which of the following is not a function of cytoskeleton in a cell ?

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  8. The stain used to visualise mitochondria is

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  9. Assertion : Rudolf Virchow modified the hypothesis of cell theory give...

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  10. Assertion : Cells vary greatly in their shape. Reason : The shape of...

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  11. Assertion : Pili are nonmotile appendages of bacteria. Reason : Pili...

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  12. Assertion : The fimbriae are elongated tubular structures made of a sp...

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  13. Assertion : The cells that have membrane bound organelles are called e...

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  14. Assertion : Peripheral proteins are partially or totally buriend in th...

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  15. Assertion : the quasifluid nature of lipid enables lateral movement po...

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  16. Assertion : The middle lamella is a layer made up of calcium pectate. ...

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  17. Assertion : A plant bursts if placed in water. Reason : High turgor ...

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  18. Assertion : The endomembrane system includes endoplasmic reticulum (ER...

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  19. Assertion : The endoplasmic reticulum which lacks ribosomes is called ...

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  20. Assertion : The Golgi apparatus mainly performs the function of packag...

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