(d) drying up
Ans: (a)
152. The disease in which blood clotting does not take place is known as
      (a) Xerophthalmia
      (b) Haemopoeisis
      (c) Haemophilia
      (d) Haemoerythrin
Ans: (c)
153. The enzyme that is necessary to bring about clotting of blood is
      (a) peptidase
      (b) amylase
      (c) lipase
      (d) thrombokinase
Ans: (d)
154. Clotting of blood is
      (a) a chain reaction
      (b) reversible reaction
      (c) reflex action
      (d) no reaction
Ans: (a)
155. The blood clotting requires the vitamin
      (a) A
      (b) B
      (c) C
      (d) K
Ans: (d)
156. Which organelle in the cell, other than nucleus, contains DNA?
      (a) Centriole
      (b) Golgi apparatus
      (c) Lysosome
      (d) Mitochondrion
Ans: (d)
157. Which of the following cell organelles play the most significant role in protein synthesis?
      (a) Lysosome and Centrosome
      (b) Endoplasmic reticulum and Ribosome
      (c) Golgi apparatus and Mitochondria
      (d) Lysosome and Mitochondria
Ans: (b)
158. Match the following:
          List-I                        List-2
          (Physiological processes) (Cell organelles)
          A. Photosynthesis             1. Plasma membrane
          B. Mineral uptake             2. Chloroplast
          C. Respiration                3. Mitochondria
          D. Protein synthesis          4. Ribosomes
                    A         B         C         D
               (a) 1          2         3         4
               (b) 1          2         4         3
               (c) 2          1         3         4
               (d) 2          1         4         3
Ans: (c)
159. When one gene controls two or more different characters simultaneously, the phenomenon is called
      (a) Apomixis
      (b) Pleiotropy
      (c) Polyploidy
      (d) Polyteny
Ans: (b)
160. The scientist who discovered the blood groups is
      (a) Landsteiner
      (b) TH Morgan