Class XI

 In penicillin production, pH of culture medium is maintained between
  1. 5 and 6
  2. 4 and 6
  3. 6 and 7
  4. 4 and 5
Convection may reduces body temperature through
  1. Excessive sweating
  2. Sitting in front of a fan
  3. Bathing
  4. Expiration
Due to chemical energy, water and carbon dioxide are converted into
  1. Cellulose
  2. Carbohydrates
  3. Photolysis of water
  4. Starch
 Atria and ventricles
  1. Work simultaneously
  2. Work alternately
  3. Work unproportionally
  4. Work proportionally
 Bacteria
  1. Can be seen with naked eye
  2. Are in form of pupa
  3. Are larger than virus
  4. Can only be controlled through bacteriophages
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