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General Knowledge :: Biology

  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


  3. Movement of cell against concentration gradient is called

  4. A.

     Active transport

    B.

     Diffusion

    C.

     Osmosis

    D.

     Passive transport


  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


  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


  9. Which process requires no energy from the cell?

  10. A.

     Osmosis

    B.

     Diffusion

    C.

     Both A & B

    D.

     None of the above


  11. Oxygen crosses a plasma membrane by

  12. A.

     Osmosis

    B.

     Evaporation

    C.

     Concatenation

    D.

     Diffusion


  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


  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


  17. The process of evaporation occurs from

  18. A.

     Root

    B.

     Stem

    C.

     Leaf

    D.

     Entire 'plants' surface


  19. Which process requires cellular energy?

  20. A.

     Passive transport

    B.

     Active transport

    C.

     Both A & B

    D.

     None of the above