Important General Biology MCQs - 4
1. Why do we feel drowsy after a heavy meal?
(a) The biological clock is upset
(b) The body muscles are fatigued
(c) The hypothalamus produces melatonin to induce sleep
(d) Brain receives less oxygen as blood rushes to supply oxygen and nutrition to the contracting stomach and intestines ✓
2. Ready source of energy available for athletes is
(a) Carbohydrates ✓
(b) Fats
(c) Proteins
(d) Vitamins
3. Chromosomes are:
(a) Present only in the nucleus of a cell
(b) The biggest in number in human cells
(c) Made up of DNA as a main component ✓
(d) Visible in all cells at every time
4. The part of the cell which is essential for protein synthesis is:
(a) Chloroplast
(b) Ribosomes ✓
(c) Golgi bodies
(d) Chromosomes
5. Short sightedness is due to:
(a) Shifting of the iris
(b) Weaker muscles
(c) Elongation of eye balls ✓
(d) Weakening of the retina
6. There are approximately _____ muscles in human body.
(a) 200
(b) 350
(c) 500
(d) 700 ✓
7. The organ which destroys worn out RBCs in the body of a vertebrate is:
(a) Pancreas
(b) Liver
(c) Bone marrow
(d) Spleen ✓
8. The saliva helps in the digestion of:
(a) Proteins
(b) Fats
(c) Fibers
(d) Starch ✓
9. Biological death of a patient means death of tissues of the:
(a) Kidney
(b) Heart
(c) Lungs
(d) Brain ✓
10. Which of the following hormones contains iodine?
(a) Adrenaline
(b) Insulin
(c) Testosterone
(d) Thyroxine ✓
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