Class XI

Chronic Obstructive lung disease occurs because of
  1. Chronic bronchitis
  2. Emphysema
  3. Asthma
  4. Both A and B
First use of pure microbiological process in an industrial procedure was made by
  1. Alexander Fleming
  2. Louis Pasteur
  3. Charles Darwin
  4. Chaim Weizmann
Lactose (C12H22O11) is largely obtained from
  1. Malt sugar
  2. Grape sugar
  3. Milk sugar
  4. Cane sugar
 Tadpole shaped viruses are largely
  1. Tobacco mosaic virus
  2. Bacteriophages
  3. Influenza virus
  4. May cause death
Unsaturated fatty acid chains bend at places of
  1. cCarbon molecules
  2. Hydrogen molecules
  3. Oxygen molecules
  4. All of these
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