Biology MCQ Question and Answer

Biology MCQ Question and Answer
161. Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of
  • hormones
  • enzymes
  • proteins
  • vitamins
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162. On which of the following plants did Gregor Mendal perform his classical experiment?
  • Gram
  • Maize
  • Pea
  • Wheat
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163. Outer covering of virus made up of protein is
  • capsid
  • coat
  • virion
  • viriod
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164. Number of chromosomes in Down's syndrome is
  • 46
  • 47
  • 48
  • 49
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165.  Mutation is
  • a factor responsible for plant growth
  • a change which affects the offspring of F2 generation only
  • a change that is inherited
  • a change which affects the parents
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166. Ptyalin is an enzyme produced in the
  • salivary glands
  • pituitary glands
  • thyroid glands
  • pancreas
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167. Norepinephrine increases
  • respiration
  • urine production
  • saliva production
  • blood pressure
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168.  Our major foods, fibres, spices, fruits and beverage crops are
  • flowering plants
  • gymnosperms plants
  • pteridophytes
  • bryophytes
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169. Most of the red, blue and purple colours of plants are due to a pigment called
  • anthocyanin
  • carotene
  • chlorophyll
  • xanthophylls
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170. Most abundant tissues of our body are
  • muscular
  • connective
  • epithelial
  • nervous
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