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261. The smallest size of a cell that can be seen with naked eye is:
  A.  10 micron
  B.  1 micron
  C.  100 micron
  D.  1000 micron
     
   
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262. The red, orange and yellow colours of leaf is due to:
  A.  Aldehydes
  B.  Carotenoid
  C.  Lignins
  D.  Tannis
     
   
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263. Master copy of generic information is
  A.  Nuclues
  B.  r-RNA
  C.  DNA
  D.  m-RNA
     
   
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264. Contraceptive pills in the market contain
  A.  Inorganic compounds
  B.  Herbicides
  C.  Steriod-hormones
  D.  Antibiotics
     
   
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265. Nematocysts are present in
  A.  Sea anemone
  B.  Ascaris
  C.  Centipede
  D.  Starfish
     
   
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266. Which of the following micro-organism is used in milk curdling?
  A.  Acetobacter
  B.  Leuconostoc
  C.  Bacillus
  D.  Lactobacillus
     
   
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267. Which of the following is present in Chlorophyull molecule?
  A.  Mg
  B.  Mn
  C.  Fe
  D.  K
     
   
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268. White Revolution is related to
  A.  Milk producion
  B.  Wheat production
  C.  Flood control
  D.  Fish production
     
   
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269. BCG vaccination is given at the age of:
  A.  2-3 years
  B.  Within 15 days
  C.  Newborn
  D.  10 years
     
   
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270. 'Kyoto Protocol', an agreement signed by various contries, is associated with
  A.  Deep Sea Oil and Mineral Exploration
  B.  Building common food stock to save human beings from any natural disaster
  C.  International Trade
  D.  Clean Environment and Climate Change
     
   
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