Class XII

Which carbohydrate is an essential constituent of plant cells ?
  1. Starch
  2. Cellulose
  3. Sucrose
  4. Vitamin .
Enzymes ;
  1. have optimum activity at body temperature
  2. consists of amino acids
  3. carbohydrates
  4. have all these properties .
The reagent which forms crystalline osazone derivative when reacted with glucose is ;
  1. Fehling solution
  2. Phenylhydrazine
  3. Benedict solution
  4. Hydroxylamine
Night blindness is caused by deficiency of which vitamin ?
  1. Vitamin A
  2. Vitamin B
  3. Vitamin C
  4. Vitamin D
The enzyme which helps in the production of alcohol from monosaccharides is ;
  1. Lactase
  2. Diastase
  3. Amylase
  4. Zymase .
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