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  1. Salts and sugars works to preserve foods by creating a

  2. A.

     Hypertonic environment

    B.

     Lower pH

    C.

     Depletion of nutrients

    D.

     Lower osmotic pressure

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  3. Movement of cell against concentration gradient is called

  4. A.

     Active transport

    B.

     Diffusion

    C.

     Osmosis

    D.

     Passive transport

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  5. Which one among the following Indian scientist proposed a theory for long distance transport of water in plants?

  6. A.

     J.C. Bose

    B.

     Birbal Sahni

    C.

     P. Maheshwari

    D.

     N.S. Parihar

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  7. The movement of materials across the cell membrane with the help of biological energy provided by ATP is called

  8. A.

     Active Transport

    B.

     Passive Transport

    C.

     Endocytosis

    D.

     Fractionation

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  9. Which process requires no energy from the cell?

  10. A.

     Osmosis

    B.

     Diffusion

    C.

     Both A & B

    D.

     None of the above

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  11. Oxygen crosses a plasma membrane by

  12. A.

     Osmosis

    B.

     Evaporation

    C.

     Concatenation

    D.

     Diffusion

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  13. Which of the following is true of osmosis?

  14. A.

     It is a type of diffusion

    B.

     Movement is against water's concentration gradient

    C.

     Requires energy

    D.

     All of the above

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  15. The water readily available to plants for absorption by roots is

  16. A.

     Gravitational water

    B.

     Rain water

    C.

     Hygroscopic water

    D.

     Capillary water

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  17. The process of evaporation occurs from

  18. A.

     Root

    B.

     Stem

    C.

     Leaf

    D.

     Entire 'plants' surface

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  19. Which process requires cellular energy?

  20. A.

     Passive transport

    B.

     Active transport

    C.

     Both A & B

    D.

     None of the above

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