24. Who discovered the electron microscope?
    (a) Knoll and Ruska
    (b) Rudolf and Kolliker
    (c) Robert Hooke
    (d) CP Swanson
Ans: (a)
25. The function of a cell wall is
    (a) to give definite shape to the cell
    (b) to provide mechanical strength and protection to the cell
    (c) to prevent the cell from desiccation
    (d) All the above
Ans: (d)
26. Match the following:
    List-1                                       List-2
    A. William Seifriz                           1. Golgibodies
    B. Flemming and Kollicker                    2. Endoplasmic reticulum
    C. Camillo Golgi                             3. Plasma membrane
    D. Porter Palade and Thomson                 4. Mitochondria
    Codes:
         A         B         C        D
   (a) 4           2         3        1
   (b) 2           3         4        1
   (c) 3           2         1        4
   (d) 3           4         1        2
Ans: (d)
27. Match the following:
    List-1                                       List-2
    A. Louis Pasteur                  1. DNA
    B. Walter Flemming                2. Life begets life
    C. Watson and Crick               3. Lysosome
    D. Christian de Duve              4. Mitosis
    Codes:
         A         B         C        D
   (a) 2           4         1        3
   (b) 3           2         1        4
   (c) 2           1         3        4
   (d) 2           3         1        4
Ans: (a)
28. Match the following:
    List-1                            List-2
    A. Purkinje                       1. Cell theory
    B. Shleiden and Schwann           2. Microscope
    C. Leuwenhoek                     3. Quinine
    D. Cinchona officinalis           4. Protoplasm
    Codes:
         A         B         C        D
   (a) 3           1         4        2
   (b) 4           1         2        3
   (c) 4           2         1        3
   (d) 1           2         3        4
Ans: (b)
29. The bone cells are connected with each other by
   (a) Haversian canal
   (b) canaliculi
   (c) capillaries
   (d) matrix
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