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Writer's pictureVikas Yadav

Important MCQs From Chapter Life Processes | Class X | CBSE Board | Biology Science

Nutrition


1. Which of the following is not a part of the human digestive system?

   a) Esophagus

   b) Small intestine

   c) Lungs

   d) Stomach

 

2. The process by which green plants prepare their own food is called:

   a) Respiration

   b) Photosynthesis

   c) Transpiration

   d) Digestion

 

3. What is the main site of photosynthesis in plants?

   a) Roots

   b) Flowers

   c) Leaves

   d) Stems

 

4. Which of the following substances is produced during photosynthesis?

   a) Oxygen

   b) Carbon dioxide

   c) Nitrogen

   d) Methane

 

5. In which part of the human digestive system does the majority of nutrient absorption occur?

   a) Mouth

   b) Stomach

   c) Small intestine

   d) Large intestine

 

6. Which organ produces bile?

   a) Pancreas

   b) Liver

   c) Stomach

   d) Gallbladder

 

7. Which enzyme is responsible for the digestion of proteins in the stomach?

   a) Amylase

   b) Pepsin

   c) Lipase

   d) Trypsin

 

8. The process of breaking down food into simpler substances is called:

   a) Ingestion

   b) Digestion

   c) Assimilation

   d) Absorption

 

9. Which of the following is a heterotrophic mode of nutrition?

   a) Photosynthesis

   b) Chemosynthesis

   c) Parasitic

   d) Autotrophic

 

10. Which part of the plant is mainly involved in the absorption of water and minerals?

    a) Stem

    b) Leaves

    c) Roots

    d) Flowers

 

Respiration

 

11. What is the main function of the respiratory system?

    a) Digestion of food

    b) Transport of blood

    c) Exchange of gases

    d) Excretion of waste

 

12. Which gas is taken in during respiration?

    a) Nitrogen

    b) Carbon dioxide

    c) Oxygen

    d) Helium

 

13. The respiratory organ in humans is:

    a) Kidneys

    b) Liver

    c) Lungs

    d) Heart

 

14. During inhalation, the diaphragm:

    a) Relaxes

    b) Contracts and moves downwards

    c) Contracts and moves upwards

    d) Remains stationary

 

15. What is the primary respiratory pigment in humans?

    a) Myoglobin

    b) Hemoglobin

    c) Chlorophyll

    d) Carotene

 

16. Anaerobic respiration takes place in:

    a) Presence of oxygen

    b) Absence of oxygen

    c) Presence of carbon dioxide

    d) Presence of nitrogen

 

17. The by-products of aerobic respiration are:

    a) Oxygen and glucose

    b) Carbon dioxide and water

    c) Lactic acid and water

    d) Ethanol and carbon dioxide

 

18. The tiny air sacs in the lungs where gas exchange occurs are called:

    a) Bronchi

    b) Trachea

    c) Alveoli

    d) Larynx

 

19. Which of the following organisms use gills for respiration?

    a) Birds

    b) Insects

    c) Fish

    d) Mammals

 

20. Which organelle is known as the powerhouse of the cell because it is the site of cellular respiration?

    a) Chloroplast

    b) Mitochondria

    c) Ribosome

    d) Golgi apparatus

 

Transportation

 

21. The fluid part of blood is known as:

    a) Plasma

    b) Platelets

    c) White blood cells

    d) Red blood cells

 

22. Which blood vessel carries oxygenated blood from the lungs to the heart?

    a) Aorta

    b) Vena cava

    c) Pulmonary artery

    d) Pulmonary vein

 

23. The main function of red blood cells is to:

    a) Fight infection

    b) Clot blood

    c) Transport oxygen

    d) Digest food

 

24. What is the primary function of the heart?

    a) To digest food

    b) To pump blood

    c) To filter waste

    d) To produce hormones

 

25. Which part of the plant is responsible for the transportation of water and minerals?

    a) Phloem

    b) Xylem

    c) Stomata

    d) Chloroplast

 

26. Which of the following has valves to prevent the backflow of blood?

    a) Arteries

    b) Veins

    c) Capillaries

    d) All of the above

 

27. The liquid portion of blood without clotting factors is called:

    a) Serum

    b) Plasma

    c) Lymph

    d) Hemoglobin

 

28. The process by which water evaporates from the leaves of plants is called:

    a) Photosynthesis

    b) Respiration

    c) Transpiration

    d) Digestion

 

29. Which blood component is responsible for clotting?

    a) Red blood cells

    b) White blood cells

    c) Platelets

    d) Plasma

 

30. What structure in plants transports food from the leaves to other parts?

    a) Xylem

    b) Phloem

    c) Roots

    d) Stomata

 

Excretion

 

31. The main excretory organ in humans is:

    a) Lungs

    b) Skin

    c) Kidneys

    d) Liver

 

32. The functional unit of the kidney is:

    a) Nephron

    b) Neuron

    c) Alveoli

    d) Villi

 

33. Urea is produced in the:

    a) Kidney

    b) Liver

    c) Heart

    d) Lungs

 

34. Which of the following is a waste product of protein metabolism?

    a) Carbon dioxide

    b) Urea

    c) Oxygen

    d) Glucose

 

35. The process of removing metabolic waste from the body is called:

    a) Digestion

    b) Respiration

    c) Excretion

    d) Circulation

 

36. Which organ helps in the detoxification of harmful substances in the blood?

    a) Kidney

    b) Liver

    c) Heart

    d) Lungs

 

37. The structure in the nephron that filters blood is called:

    a) Loop of Henle

    b) Glomerulus

    c) Tubule

    d) Ureter

 

38. What is the main nitrogenous waste in humans?

    a) Ammonia

    b) Uric acid

    c) Urea

    d) Nitrate

 

39. In plants, the removal of excess water is mainly carried out through:

    a) Photosynthesis

    b) Respiration

    c) Transpiration

    d) Excretion

 

40. Which part of the nephron is involved in reabsorbing water and nutrients from the filtrate?

    a) Bowman's capsule

    b) Loop of Henle

    c) Collecting duct

    d) Glomerulus

 

Miscellaneous

 

41. What is the name of the pigment that gives the green color to plants?

    a) Hemoglobin

    b) Chlorophyll

    c) Carotene

    d) Xanthophyll

 

42. Which part of the human body is mainly involved in the absorption of digested nutrients?

    a) Mouth

    b) Stomach

    c) Small intestine

    d) Large intestine

 

43. What is the name of the process by which plants lose water in the form of water vapor?

    a) Photosynthesis

    b) Transpiration

    c) Respiration

    d) Digestion

 

44. Which of the following is a product of anaerobic respiration in muscles?

    a) Lactic acid

    b) Glucose

    c) Oxygen

    d) Water

 

45. The process by which food is taken into the body is called:

    a) Digestion

    b) Ingestion

    c) Absorption

    d) Assimilation

 

46. Which of the following is not a function of the human stomach?

  

 

 a) Secreting digestive enzymes

    b) Absorbing water

    c) Mixing food with gastric juice

    d) Killing bacteria with acid

 

47. Which of the following is a function of bile?

    a) Breaking down proteins

    b) Emulsifying fats

    c) Breaking down carbohydrates

    d) Absorbing water

 

48. The blood vessels that carry blood away from the heart are called:

    a) Veins

    b) Capillaries

    c) Arteries

    d) Vena cava

 

49. The term for the rhythmic contraction and relaxation of muscles to move food through the digestive system is:

    a) Peristalsis

    b) Digestion

    c) Absorption

    d) Assimilation

 

50. Which of the following statements is true about autotrophs?

    a) They obtain their food from other organisms.

    b) They can make their own food using sunlight.

    c) They are only found in animals.

    d) They do not require water for food production.

 

Answers

 

1. c) Lungs 

2. b) Photosynthesis 

3. c) Leaves 

4. a) Oxygen 

5. c) Small intestine 

6. b) Liver 

7. b) Pepsin 

8. b) Digestion 

9. c) Parasitic 

10. c) Roots 

 

11. c) Exchange of gases 

12. c) Oxygen 

13. c) Lungs 

14. b) Contracts and moves downwards 

15. b) Hemoglobin 

16. b) Absence of oxygen 

17. b) Carbon dioxide and water 

18. c) Alveoli 

19. c) Fish 

20. b) Mitochondria 

 

21. a) Plasma 

22. d) Pulmonary vein 

23. c) Transport oxygen 

24. b) To pump blood 

25. b) Xylem 

26. b) Veins 

27. a) Serum 

28. c) Transpiration 

29. c) Platelets 

30. b) Phloem 

 

31. c) Kidneys 

32. a) Nephron 

33. b) Liver 

34. b) Urea 

35. c) Excretion 

36. b) Liver 

37. b) Glomerulus 

38. c) Urea  

39. c) Transpiration 

40. b) Loop of Henle 

 

41. b) Chlorophyll 

42. c) Small intestine 

43. b) Transpiration 

44. a) Lactic acid 

45. b) Ingestion 

46. b) Absorbing water 

47. b) Emulsifying fats 

48. c) Arteries 

49. a) Peristalsis 

50. b) They can make their own food using sunlight 

 

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