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