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General Science MCQ Questions For Competitive exams

 

Test Paper 19

Learn General science questions for competitive exams NCERT MCQ Questions 

1. Breakdown of food in cells with energy release is called as ?

a) Cells breakdown

b) Food breakdown

c) Cellular respiration

d) None

Show Answer

c) Cellular respiration

 

2. In cell, glucose breaks down to which of the following components using oxygen ?

a) Carbon dioxide

b) Water

c) Both 

d) None

Show Answer

c) Both

 

3. Breakdown of glucose using oxygen is called as ?

a) Anaerobic Respiration

b) Aerobic Respiration

c) Both

d) None

Show Answer

b) Aerobic Respiration

 

3. Breakdown of glucose without use of oxygen is called as ?

a) Anaerobic Respiration 

b) Aerobic Respiration

c) Both

d) None

Show Answer

a) Anaerobic Respiration

 

4. Which of the following organism can survives without oxygen ?

a) Yeast

b) Bacteria

c) Both

d) None

Show Answer

a) Yeast

 

5. Glucose breakdown into which of the following products in the absence of oxygen ?

a) Alcohol and  CO2 

b) CO2 and water

c) Alcohol and CO

d) None

Show Answer

a) Alcohol and CO2

 

6. Cells in human body can respire anaerobic ?

a) Yes

b) No

Show Answer

a) Yes
Note: Yes, But only for short time as if deficiency in oxygen

 

7. In muscles, Glucose breakdown into which of the following component in absence of oxygen ?

a) CO2

b) Lactic acid

c) Both

d) None

Show Answer

b) Lactic acid

 

8. Cramps in muscles occurs when muscle cell respire ?

a) Anaerobic Respiration 

b) Aerobic Respiration

c) Both

d) None

Show Answer

a) Anaerobic Respiration

 

9. Which of following acid accumulation causes cramps in muscle ?

a) Hydrochroric acid

b) Lactic acid

c) Both

d) None

Show Answer

b) Lactic acid

 

10. Partial breakdown of Glucose releases ?

a) Hydrochroric acid

b) Lactic acid

c) Both

d) None

Show Answer

b) Lactic acid

 

11. Humans inhalation and exhalation ?

a) Oxygen and Carbon dioxide

b) Carbon dioxide and oxygen

c) Both

d ) None

Show Answer

a) Oxygen and Carbon dioxide

 

12. On Average, adult humans breathing rate ?

a) 15- 50 times in min

b) 25- 35 times in min

c) 35- 50 times in min

d) 15- 18 times in min

Show Answer

d) 15- 18 times in min

 

13. During inhalations, Ribs moves _____ and diaphragm moves ___ ?

a) Down and Down

b) Up- Outwards and Down

c) Up-outwards and Up

d) None

Show Answer

b) Up- Outwards and Down

 

14. Humans inhales air ?

a) 50% Oxygen and 10% Carbon dioxide

b) 80% Oxygen and 10% Carbon dioxide

c) 90% Oxygen and 10% Carbon dioxide

d) 21% Oxygen and 0.04% Carbon dioxide

Show Answer

d) 21% Oxygen and 0.04% Carbon dioxide

 

15. Humans exhales air ?

a) 16.4% Oxygen and 4.4% Carbon dioxide

b) 20% Oxygen and 10% Carbon dioxide

c) 16.4% Oxygen and 30% Carbon dioxide

d) 21% Oxygen and 0.04% Carbon dioxide

Show Answer

a) 16.4% Oxygen and 4.4% Carbon dioxide

 

16. Earthworm breathes through ?

a) Skin

b) Body

c) Lungs

d) None

Show Answer

a) Skin

 

17. Cockroach breathes through

a) Skin

b) Tracheae 

c) Lungs

d) None

Show Answer

b) Tracheae

 

18. Fish breathes through

a) Skin

b) Tracheae 

c) Lungs

d) Gills

Show Answer

d) Gills

 

19. For Humans, Breathing of pure oxygen for long time is ?

a) Safe

b) Unsafe

c) Both

d) None

Show Answer

b) Unsafe

 

20. Fluid part of blood is called ?

a) Blood liquid

b) Plasma

c) Hemoglobin

d) None

Show Answer

b) Plasma

 

21. Blood is in red colour because of ?

a) Red Blood liquid

b) Red Plasma

c) Hemoglobin 

d) None

Show Answer

c) Hemoglobin

 

22. Which of the following helps in transportation of oxygen to all cells in the body ?

a) Lungs

b) Red Plasma

c) Hemoglobin 

d) None

Show Answer

c) Hemoglobin

 

23. Which of following fights against germs in our body ?

a) RBC

b) WBC

c) Both

d) None

Show Answer

b) WBC

 

24. Types of Blood Vessels?

a) Arteries and Veins

b) Arteries and Platelets

c) Platelets and Veins

d) None

Show Answer

a) Arteries and Veins

 

25. Arteries carries _______ rich blood ?

a) Carbon dioxide

b) Oxygen

c) Both

d) None

Show Answer

b) Oxygen

 

26. Arteries carry blood from  ?

a) All parts to Heart

b) Hearts to all parts

c) Both

d) None

Show Answer

b) Hearts to all parts

 

27. Veins carries _______ rich blood ?

a) Carbon dioxide

b) Oxygen

c) Both

d) None

Show Answer

a) Carbon dioxide

 

28. Veins carry blood from  ?

a) All parts to Heart

b) Hearts to all parts

c) Lungs

d) None

Show Answer

a) All parts to Heart

 

29. Arteries has _______ walls ?

a) Thin walls

b) Thick walls

c) Thick elastic walls

d) None

Show Answer

c) Thick elastic walls

 

30. Veins has _______ walls ?

a) Thin walls

b) Thick walls

c) Thick elastic walls

d) None

Show Answer

a) Thin walls

 

31. Human hearts has ____ chambers ?

a) 5 chambers

b) 3 chambers

c) 4 chambers

d) 2 chambers

Show Answer

c) 4 chambers

 

32. Cockroach hearts has ______ Chambers ?

a) 15 chambers

b) 13 chambers

c) 4 chambers

d) 2 chambers

Show Answer

b) 13 chambers

 

33. Fish hearts has ______ Chambers ?

a) 15 chambers

b) 13 chambers

c) 4 chambers

d) 2 chambers

Show Answer

d) 2 chambers

 

34. Reptiles and amphibians hearts has ______ Chambers ?

a) 5 chambers

b) 3 chambers

c) 4 chambers

d) 2 chambers

Show Answer

b) 3 chambers

 

35. Mammals, birds and crocodiles hearts has ______ Chambers ?

a) 5 chambers

b) 3 chambers

c) 4 chambers

d) 2 chambers

Show Answer

c) 4 chambers

 

36. Human hearts, upper chamber and lower chamber called as ?

a) Ventricles and Atria

b) Atria and Ventricles

c) Both

d) None

Show Answer

 b) Atria and Ventricles

 

37. Who discovered circulation of blood ?

a) William Hare

b) William Benck

c) William Harvey

d) None

Show Answer

c) William Harvey

 

38. Filtering of blood is done by blood capillaries in ?

a) Heart

b) Lung

c) Kidneys

d) None

Show Answer

c) Kidneys

 

39. Urine contains ?

a) Nitrogen (2.5%)

b) Urea (2.5%)

c) Ammonia (2.5%)

d) None

Show Answer

b) Urea (2.5%)

 

40. Aquatic animals excretes ?

a) Nitrogen

b) Urea

c) Ammonia  

d) None

Show Answer

c) Ammonia

 

41. Birds, Snakes and Lizards excretes ?

a) Uric acid 

b) Urea

c) Ammonium acid

d) None

Show Answer

a) Uric acid

 

42. Plants absorbs water and minerals by ?

a) Stem

b) Roots

c) Leaves

d) None

Show Answer

b) Roots

 

43. In Plants, Transportation of water and nutrients is carried by vascular tissues called as ?

a) Xylem

b) Phloem

c) Both

d) None

Show Answer

a) Xylem

 

44. In Plants, Transportation of food to all parts is carried by vascular tissues called ?

a) Xylem

b) Phloem

c) Both

d) None

Show Answer

b) Phloem

 

45. Circulatory system consists of ?

a) Heart

b) Blood vessel

c) Both

d) None

Show Answer

c) Both

 

46. In humans, Average Heart beats in an adult  ?

a) 25 – 30 times per min 

b) 100 – 150 times per min 

c) 70 – 80 times per min 

d) 25 – 100 times per min 

Show Answer

c) 70 – 80 times per min

 

47. In Plants, water is lost in form of water vapor during transpiration through ?

a) Leaves

b) Stem

c) Stomata

d) None

Show Answer

c) Stomata

 

48. Water absorbed by roots is pulled up to reach the stem and leaves by ? 

a) Respiration 

b) Transpiration 

c) Anerobic Respiration

d) None

Show Answer

b) Transpiration

 

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