Basic Zoology Questions and Answers

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Q71
The functional unit of contractile system in striated muscle is-
  • A Cross bridges
  • B Sarcomeres
  • C Myofibril
  • D Z-band
Answer: Option B
Q72
Globular proteins undergo structural changes in response to extremes of pH or temperature, is called-
  • A Renaturation
  • B Denaturation
  • C Combination
  • D Both (A) and (B)
Answer: Option A
Q73
The study of relationships between size and shape is known as-
  • A Allometry
  • B Heterochrony
  • C Isometry
  • D Allochrony
Answer: Option D
Q74
A localised tumour covered by connective tissue is called-
  • A Metastasis
  • B Neoplasm
  • C Benign tumour
  • D Malignant tumour
Answer: Option C
Q75
Hürthle cell is associated with-
  • A Thyroid gland
  • B Pituitary gland
  • C Adrenal gland
  • D Pancreas
Answer: Option A
Q76
A metastatic cancerous tumour is termed ‘sarcoma’, if the disorder is in-
  • A Immune system
  • B Epithelial cells
  • C Fibroblasts
  • D Circulatory system
Answer: Option A
Q77
Graft between isogenic individuals is known as-
  • A Syngraft
  • B Allograft
  • C Xenograft
  • D None of these
Answer: Option A
Q78
The most striking example of point mutation is found in a disorder called-
  • A Thalassemia
  • B Nightblindness
  • C Down’s syndrome
  • D Sickle-cell anaemia
Answer: Option C
Q79
The phenomenon of ‘industrial melanism’ demonstrates-
  • A Natural selection
  • B Induced mutation
  • C Reproductive isolation
  • D Geographical isolation
Answer: Option B
Q80
Overproduction of which of the following neurotransmitter has been associated with the mental disorder ‘Schizophrenia’ ?
  • A Acetylcholine
  • B GABA
  • C Dopamine
  • D Serotonin
Answer: Option C

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