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Friday, May 27, 2011

zoology MCQ for Exams

zoology MCQ for Exams
Competitive exam question in Zoology MCQ questions
Solved Multiple Choice Questions in Zoology
1. CO2 and 02 balance in atmosphere is due to
(a) photorespiration
(b) photosynthesis
(c) respiration
(d) leaf anatomy
Ans. (b)


2. Young fruits are green but develop brilliant shade of colour towards ripening because
(a) amount of sugar increases in them
(b) amount of organic acids decreases in them
(c) chloroplasts are degraded to carotenes and xanthophylls
(d) of ageing
Ans. (c)

3. During photosynthesis the oxygen in glucose comes from
(a) water
(b) carbon dioxide
(c) both from water and carbon dioxide
(d) oxygen in air
Ans. (b)

4. A specific function of light energy in the process of photosynthesis is to
(a) activate chlorophyll
(b) split water
(c) synthesis glucose
(d) reduce CO2
Ans. (a)

5. Who received Noble Prize for working out the early carbon pathway of
photosynthesis?
(a) Calvin
(b) Krebs
(c) Khorana
(d) Watson
Ans. (a)

6. It the rate of translocation of food is slow then the rate of photosynthesis will
(a) remains the same
(b) becomes double
(c) decrease
(d) increase
Ans. (c)

7. Digestion is
(a) conversion of large food particles into small food particles
(b) conversion of small food particles into large food particles
(c) conversion of food into protoplasm
(d) conversion of non-diffusible food particles into diffusible food
Ans. (d)

8. Which teeth are different in shape, size and function then these are called
(a) acrodont
(b) pleurodont
(c) homodont
(d) heterodont
Ans. (d)

9. The hardest part of a tooth is the
(a) dentine
(b) enamel
(c) pulp
(d) dental tubules
Ans. (b)

10. A bolus is
(a) a mass of crushed food moistened with saliva
(b) the semisolid material resulting from partial digestion in the stomach
(c) the milky emulsified fat absorbed from small intestine
(d) indigestible materials that helps in movement and absorption
Ans. (a)

11. Curdling of milk in the stomach is due to the action of
(a) pepsin
(b) rennin
(c) HC1
(d) rennin
Ans. (b)

12. Inactive enzyme precursors, such as pepsinogen for pepsin, are called
(a) holoenzymes
(b) actinases
(c) zymogens
(d) mucopolysaccharides
Ans. (c)

13. Gasthc digestion takes place efficiently in
(a) acidic medium
(b) alkaline medium
(c) neutral medium
(d) highly alkaline medium
Ans. (a)

14. Where is bile produced?
(a) In gall bladder
(b) In blood
(c) In liver
(d) In spleen
Ans. (c)

15. Pancreas has
(a) only endocrine cells
(b) only one type of cell, the same functioning both in an exocrine and endocrine
(e) two types of cells-exocrine and endocrine
(d) only exocrine cells
Ans. (c)

16. The specific function of liver is
(a) excretion
(b) digestion
(c) histolysis
(d) glycogenesis and glycogenolysis
Ans. (d)

17. Largest gland in human body is
(a) liver
(b) pancreas
(c) pituitary
(d) thyroid
Ans. (a)

18. The tissue respiration refers to
(a) Inspiration
(b) External respiration
(c) Internal respiration
(d) Expiration
Ans. (c)

19. The gas-exchange surfaces of larger aquatic animals are
(a) Tracheae
(b) Malpighian tubules
(c) Gill
(d) Book lungs
Ans. (c)

20. During hibernation, the frog respires by
(a) Lungs only
(b) Partly by lungs and partly by skin
(c) Both skin and lungs
(d) Skin only
Ans. (d)

21. The covering of lungs is called
(a) Pericardium
(b) Pleural membrane
(c) perichondrium
(d) Peritoneum
Ans. (b)

22. A person having high fever may be breathing faster than normal. The reason for this faster breathing is due to
(a) Additional need of 02 for germs
(b) Mental worry of the patient
(c) High temperature of body ‘
(d) Loss of appetite
Ans. (c)

23. The maximum possible volume of air, which can be inspiration, is called as
(a) Tidal air volume
(b) Vital lung capacity
(c) Complementally air volume
(d) Total lung capacity
Ans. (b)

24. Amount of 02 normally carried by 100 ml of pure blood, is
(a) 40m1
(b) 10ml
(c) 20ml
(d) 30 ml
Ans. (c)

25. If the CO2 concentration in the blood increases, the breathing shall
(a) Increase
(c) Affected
(b) Decrease
(d) Stop
Ans. (a)

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