Class XI

If a cell with 20 chromosomes undergoes mitosis, each daughter cells has
  1. 10 chromosomes
  2. 20 chromosomes
  3. 30 chromosomes
  4. 46 chromosomes
Proteins are but
  1. essential to replace worn-out protoplasm
  2. helps in hydrolysis of enzymes
  3. a source of energy
  4. help to develop antibodies to combat diseases
Hypothyroidism refers to
  1. overactive thyroid gland
  2. underactive thyroid gland
  3. underactive testes
  4. overactive testes
 Diseases like rickets, scurvy and beriberi occur due to deficiency of
  1. Amino acids
  2. Carbohydrates
  3. Lipids
  4. Vitamins
External agencies are not required in
  1. natural vegetative propagation
  2. sexual reproduction
  3. bisexual reproduction
  4. trisexual reproduction
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