Life Processes Class 10 MCQ: Understanding Vital Concepts

This is an in-depth guide on biological processes in Class 10 MCQ. Life processes are the essential functions that keep living beings alive. Class 10 MCQs (Multiple Choice Questions) are an important component of science exams since they assess students' grasp of many concepts connected to life processes.

100 multiple-choice questions (MCQs) with answers and explanations on the topic of life processes for Class 10:

1. Which of the following is NOT a life process?

a) Respiration

b) Digestion

c) Transportation

d) Gravity

Answer: d) Gravity

Explanation: Gravity is not a life process. It is a natural force that affects all objects with mass.

2. In which part of the digestive system does the absorption of nutrients primarily occur?

a) Stomach

b) Small intestine

c) Large intestine

d) Esophagus

Answer: b) Small intestine

Explanation: The small intestine is where most of the digestion and absorption of nutrients take place.

3. Photosynthesis is a process that occurs in the:

a) Mitochondria

b) Nucleus

c) Chloroplast

d) Golgi apparatus

Answer: c) Chloroplast

Explanation: Photosynthesis takes place in the chloroplasts of plant cells.

4. What is the primary function of red blood cells?

a) Carrying oxygen

b) Fighting infections

c) Transporting nutrients

d) Producing enzymes

Answer: a) Carrying oxygen

Explanation: Red blood cells contain hemoglobin, which binds to oxygen and transports it throughout the body.

5. Which of the following is a waste product produced during respiration in humans?

a) Glucose

b) Oxygen

c) Carbon dioxide

d) Water

Answer: c) Carbon dioxide

Explanation: During respiration, oxygen is taken in, and carbon dioxide is produced as a waste product.

6. The process of breakdown of complex food substances into simpler forms is known as:

a) Digestion

b) Assimilation

c) Circulation

d) Respiration

Answer: a) Digestion

Explanation: Digestion is the process of breaking down complex food substances into simpler forms for absorption.

7. The function of the excretory system is to:

a) Digest food

b) Pump blood

c) Eliminate waste products

d) Exchange gases

Answer: c) Eliminate waste products

Explanation: The excretory system eliminates waste products from the body, such as urine and carbon dioxide.

8. Which of the following is an autotrophic mode of nutrition?

a) Parasitism

b) Herbivory

c) Carnivory

d) Photosynthesis

Answer: d) Photosynthesis

Explanation: Photosynthesis is an autotrophic mode of nutrition, where organisms produce their food using sunlight.

9. The energy currency of the cell is:

a) Glucose

b) ATP (Adenosine Triphosphate)

c) DNA

d) RNA

Answer: b) ATP (Adenosine Triphosphate)

Explanation: ATP is the energy currency of the cell, storing and releasing energy as needed.

10. Which of the following is NOT a raw material required for photosynthesis?

a) Carbon dioxide

b) Sunlight

c) Water

d) Nitrogen gas

Answer: d) Nitrogen gas

Explanation: Nitrogen gas is not a raw material required for photosynthesis. The essential raw materials are carbon dioxide, sunlight, and water.

11. The process of breakdown of glucose in the absence of oxygen to release energy is called:

a) Photosynthesis

b) Fermentation

c) Respiration

d) Transpiration

Answer: b) Fermentation

Explanation: Fermentation is the breakdown of glucose in the absence of oxygen, producing a small amount of energy and either alcohol or lactic acid.

12. Which part of the plant carries out transpiration?

a) Leaves

b) Roots

c) Flowers

d) Stem

Answer: a) Leaves

Explanation: Transpiration primarily occurs through small openings called stomata on the leaves of the plant.

13. The process of maintaining a constant internal environment in the body is known as:

a) Osmosis

b) Homeostasis

c) Diffusion

d) Turgidity

Answer: b) Homeostasis

Explanation: Homeostasis is the process of maintaining a stable internal environment, despite external changes.

14. Which of the following is responsible for carrying oxygen in the bloodstream?

a) Platelets

b) White blood cells

c) Red blood cells

d) Plasma

Answer: c) Red blood cells

Explanation: Red blood cells contain hemoglobin, which carries oxygen in the bloodstream.

15. The breakdown of pyruvate into carbon dioxide and water occurs in:

a) Cytoplasm

b) Mitochondria

c) Nucleus

d) Chloroplast

Answer: b) Mitochondria

Explanation: The breakdown of pyruvate into carbon dioxide and water occurs in the mitochondria during cellular respiration.

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

a) Photosynthesis

b) Respiration

c) Digestion

d) Excretion

Answer: a) Photosynthesis

Explanation: Photosynthesis is the process by which green plants prepare their food using sunlight, water, and carbon dioxide.

17. Which of the following is a vital component of all biomolecules (carbohydrates, proteins, lipids, and nucleic acids)?

a) Oxygen

b) Hydrogen

c) Carbon

d) Nitrogen

Answer: c) Carbon

Explanation: Carbon is the fundamental component of all biomolecules, making up their backbone structures.

18. What is the primary function of the respiratory system in humans?

a) Transporting nutrients

b) Eliminating waste products

c) Exchanging gases (oxygen and carbon dioxide)

d) Regulating body temperature

Answer: c) Exchanging gases (oxygen and carbon dioxide)

Explanation: The respiratory system is responsible for exchanging gases, taking in oxygen and eliminating carbon dioxide.

19. The breakdown of food into simpler substances by mechanical and chemical means takes place in the:

a) Stomach

b) Small intestine

c) Large intestine

d) Mouth

Answer: d) Mouth

Explanation: The process of digestion begins in the mouth, where food is broken down mechanically by chewing and chemically by enzymes in saliva.

20. The specialized cells responsible for carrying electrical signals in the nervous system are called:

a) Red blood cells

b) Nephrons

c) Neurons

d) Mitochondria

Answer: c) Neurons

Explanation: Neurons are specialized cells responsible for carrying electrical signals in the nervous system.

21. Which of the following is responsible for pumping blood throughout the body?

a) Heart

b) Brain

c) Liver

d) Lungs

Answer: a) Heart

Explanation: The heart is responsible for pumping blood and distributing it throughout the body.

22. The process of breakdown of glucose in the presence of oxygen to release energy is called:

a) Fermentation

b) Glycolysis

c) Respiration

d) Photosynthesis

Answer: c) Respiration

Explanation: Respiration is the process of breaking down glucose in the presence of oxygen to release energy.

23. Which of the following is a green pigment found in the chloroplasts of plant cells?

a) Hemoglobin

b) Melanin

c) Chlorophyll

d) Collagen

Answer: c) Chlorophyll

Explanation: Chlorophyll is the green pigment responsible for capturing sunlight during photosynthesis.

24. The process of converting absorbed nutrients into the different components of the body is called:

a) Digestion

b) Assimilation

c) Excretion

d) Circulation

Answer: b) Assimilation

Explanation: Assimilation is the process of converting absorbed nutrients into the different components of the body.

25. Which of the following is NOT a component of blood?

a) Platelets

b) Plasma

c) Red blood cells

d) Chlorophyll

Answer: d) Chlorophyll

Explanation: Chlorophyll is a pigment found in plants and is not a component of human blood.

26. Which of the following statements is true regarding aerobic respiration?

a) It occurs in the absence of oxygen.

b) It produces more energy compared to anaerobic respiration.

c) It produces alcohol as a byproduct.

d) It occurs in the cytoplasm of the cell.

Answer: b) It produces more energy compared to anaerobic respiration.

Explanation: Aerobic respiration produces more energy (ATP) compared to anaerobic respiration, as it fully breaks down glucose using oxygen.

27. The tiny hair-like structures that help in the movement of substances in the respiratory tract are called:

a) Cilia

b) Villi

c) Flagella

d) Microvilli

Answer: a) Cilia

Explanation: Cilia are tiny hair-like structures that help in moving mucus and trapped particles out of the respiratory tract.

28. Which part of the brain regulates balance and coordination of movements?

a) Cerebrum

b) Cerebellum

c) Medulla oblongata

d) Thalamus

Answer: b) Cerebellum

Explanation: The cerebellum is responsible for regulating balance and coordination of movements.

29. The process by which excess water and waste products are removed from the blood in the kidneys is called:

a) Osmosis

b) Diffusion

c) Filtration

d) Active transport

Answer: c) Filtration

Explanation: Filtration is the process by which excess water and waste products are removed from the blood in the kidneys.

Life Processes Class 10 MCQ With Answers.

30. Which of the following is the main component of the cell membrane?

a) DNA

b) RNA

c) Protein

d) Lipid (Phospholipid)

Answer: d) Lipid (Phospholipid)

Explanation: The main component of the cell membrane is a lipid called phospholipid, which forms a bilayer structure.

31. Which of the following statements is true regarding anaerobic respiration?

a) It requires oxygen for the breakdown of glucose.

b) It produces more ATP compared to aerobic respiration.

c) It produces lactic acid or alcohol as byproducts.

d) It occurs in the mitochondria of the cell.

Answer: c) It produces lactic acid or alcohol as byproducts.

Explanation: Anaerobic respiration produces lactic acid or alcohol as byproducts, depending on the type of organism.

32. The process by which water and minerals are absorbed from the soil by plant roots is called:

a) Photosynthesis

b) Transpiration

c) Respiration

d) Absorption

Answer: d) Absorption

Explanation: Absorption is the process by which water and minerals are absorbed from the soil by plant roots.

33. The cells responsible for carrying oxygen and carbon dioxide in insects are called:

a) Hemoglobin cells

b) Red blood cells

c) Phloem cells

d) Tracheal cells

Answer: d) Tracheal cells

Explanation: Insects have a network of tracheal tubes that carry oxygen and carbon dioxide throughout their bodies.

34. Which of the following is the primary pigment responsible for vision in the eye?

a) Rhodopsin

b) Melanin

c) Hemoglobin

d) Insulin

Answer: a) Rhodopsin

Explanation: Rhodopsin is the primary pigment responsible for vision in the eye, especially in low-light conditions.

35. The process of breakdown of food in the stomach by acidic secretions is called:

a) Fermentation

b) Peristalsis

c) Mastication

d) Churning

Answer: d) Churning

Explanation: The stomach breaks down food through churning, mixing it with acidic gastric secretions.

36. Which of the following is NOT a function of the liver?

a) Detoxification of harmful substances

b) Production of bile for digestion

c) Regulation of blood sugar levels

d) Production of insulin

Answer: d) Production of insulin

Explanation: The liver is not responsible for the production of insulin. Insulin is produced by the pancreas.

37. Which of the following is a waste product produced during photosynthesis in plants?

a) Oxygen

b) Carbon dioxide

c) Glucose

d) Water

Answer: b) Carbon dioxide

Explanation: Plants produce oxygen as a byproduct of photosynthesis, but carbon dioxide is used in the process.

38. Which part of the human brain controls involuntary actions such as breathing and heartbeat?

a) Cerebrum

b) Cerebellum

c) Medulla oblongata

d) Thalamus

Answer: c) Medulla oblongata

Explanation: The medulla oblongata controls involuntary actions such as breathing, heartbeat, and digestion.

39. The process of movement of molecules from a region of higher concentration to a region of lower concentration is called:

a) Osmosis

b) Diffusion

c) Active transport

d) Filtration

Answer: b) Diffusion

Explanation: Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration.

40. The process of conversion of glucose into pyruvate during cellular respiration takes place in the:

a) Cytoplasm

b) Mitochondria

c) Nucleus

d) Chloroplast

Answer: a) Cytoplasm

Explanation: The process of glycolysis (conversion of glucose into pyruvate) occurs in the cytoplasm of the cell.

41. Which of the following is a respiratory waste product produced by yeast during fermentation?

a) Oxygen

b) Carbon dioxide

c) Ethanol

d) Glucose

Answer: c) Ethanol

Explanation: Yeast produces ethanol as a waste product during fermentation.

42. The process of breakdown of glucose into lactic acid occurs in:

a) Mitochondria

b) Cytoplasm

c) Nucleus

d) Chloroplast

Answer: b) Cytoplasm

Explanation: The breakdown of glucose into lactic acid occurs in the cytoplasm during anaerobic respiration.

43. Which of the following statements is true regarding the circulatory system?

a) It transports nutrients and oxygen to cells and carries away waste products.

b) It is responsible for gas exchange in the lungs.

c) It filters waste products from the blood.

d) It produces hormones for the body.

Answer: a) It transports nutrients and oxygen to cells and carries away waste products.

Explanation: The circulatory system is responsible for transporting nutrients, oxygen, and waste products throughout the body.

44. The process of conversion of light energy into chemical energy in plants is called:

a) Transpiration

b) Photosynthesis

c) Respiration

d) Digestion

Answer: b) Photosynthesis

Explanation: Photosynthesis is the process of converting light energy into chemical energy in plants.

45. Which of the following is NOT a component of the human circulatory system?

a) Heart

b) Lungs

c) Blood vessels

d) Kidneys

Answer: d) Kidneys

Explanation: The kidneys are part of the excretory system, not the circulatory system.

46. The specialized cells responsible for carrying oxygen in the bloodstream are called:

a) Neutrophils

b) Erythrocytes

c) Lymphocytes

d) Platelets

Answer: b) Erythrocytes

Explanation: Erythrocytes, also known as red blood cells, are responsible for carrying oxygen in the bloodstream.

47. The process by which water vapor is released from the stomata of plant leaves is called:

a) Transpiration

b) Photosynthesis

c) Respiration

d) Osmosis

Answer: a) Transpiration

Explanation: Transpiration is the process by which water vapor is released from the stomata of plant leaves.

48. The process by which cells use oxygen to release energy from glucose is known as:

a) Respiration

b) Digestion

c) Fermentation

d) Photosynthesis

Answer: a) Respiration

Explanation: Respiration is the process by which cells use oxygen to release energy from glucose.

49. The primary function of the phloem in plants is to:

a) Transport water and minerals from roots to leaves

b) Carry out photosynthesis

c) Transport food (sugar) from leaves to other parts of the plant

d) Absorb sunlight for energy

Answer: c) Transport food (sugar) from leaves to other parts of the plant

Explanation: The phloem is responsible for transporting food (sugar) produced in the leaves to other parts of the plant.

Bio Life Processes Class 10 MCQ.

50. Which of the following is responsible for breaking down complex carbohydrates into simpler sugars during digestion?

a) Salivary amylase

b) Pepsin

c) Trypsin

d) Lipase

Answer: a) Salivary amylase

Explanation: Salivary amylase is an enzyme that breaks down complex carbohydrates into simpler sugars in the mouth during digestion.

51. The primary function of the respiratory system is to:

a) Transport nutrients

b) Excrete waste products

c) Exchange gases (oxygen and carbon dioxide)

d) Regulate body temperature

Answer: c) Exchange gases (oxygen and carbon dioxide)

Explanation: The respiratory system is responsible for exchanging gases, taking in oxygen and eliminating carbon dioxide.

52. The process of breakdown of glucose into energy in the presence of oxygen is called:

a) Fermentation

b) Photosynthesis

c) Respiration

d) Transpiration

Answer: c) Respiration

Explanation: Respiration is the process of breaking down glucose into energy in the presence of oxygen.

53. Which of the following is NOT a function of the excretory system?

a) Filtration of blood

b) Regulation of body temperature

c) Removal of waste products

d) Maintenance of water and electrolyte balance

Answer: b) Regulation of body temperature

Explanation: The regulation of body temperature is primarily controlled by the nervous and endocrine systems.

54. The process by which cells convert food into usable energy (ATP) is known as:

a) Digestion

b) Assimilation

c) Respiration

d) Photosynthesis

Answer: c) Respiration

Explanation: Respiration is the process by which cells convert food into usable energy (ATP).

55. The breakdown of complex organic compounds into simpler substances by decomposers is known as:

a) Digestion

b) Fermentation

c) Decomposition

d) Respiration

Answer: c) Decomposition

Explanation: Decomposition is the breakdown of complex organic compounds into simpler substances by decomposers like bacteria and fungi.

56. Which of the following structures is responsible for filtering blood and producing urine in the human body?

a) Heart

b) Liver

c) Lungs

d) Kidneys

Answer: d) Kidneys

Explanation: The kidneys filter blood and produce urine as a waste product.

57. Which of the following is a nitrogenous waste product excreted by mammals, including humans?

a) Urea

b) Carbon dioxide

c) Ammonia

d) Lactic acid

Answer: a) Urea

Explanation: Mammals, including humans, excrete urea as a nitrogenous waste product.

58. The process of breakdown of pyruvate into carbon dioxide and water occurs in the:

a) Cytoplasm

b) Mitochondria

c) Nucleus

d) Chloroplast

Answer: b) Mitochondria

Explanation: The breakdown of pyruvate into carbon dioxide and water occurs in the mitochondria during cellular respiration.

59. Which of the following is the main component of the cell wall in plant cells?

a) Cellulose

b) Chitin

c) Lipid

d) Protein

Answer: a) Cellulose

Explanation: The main component of the cell wall in plant cells is cellulose.

60. The process of breakdown of fats into fatty acids and glycerol is called:

a) Fermentation

b) Emulsification

c) Lipolysis

d) Photosynthesis

Answer: c) Lipolysis

Explanation: Lipolysis is the process of breaking down fats into fatty acids and glycerol.

61. The process of taking in oxygen and giving out carbon dioxide by living organism

is known as:

a) Respiration

b) Excretion

c) Digestion

d) Circulation

Answer: a) Respiration

Explanation: Respiration involves taking in oxygen and giving out carbon dioxide by living organisms.

62. The process of absorption of water and minerals from the soil by plant roots is known as:

a) Transpiration

b) Respiration

c) Osmosis

d) Absorption

Answer: d) Absorption

Explanation: Absorption is the process of taking up water and minerals from the soil by plant roots.

63. Which of the following is the powerhouse of the cell and is responsible for producing ATP (energy)?

a) Golgi apparatus

b) Mitochondria

c) Endoplasmic reticulum

d) Lysosomes

Answer: b) Mitochondria

Explanation: Mitochondria are the powerhouse of the cell and are responsible for producing ATP (energy).

64. The process of conversion of light energy into electrical signals in the retina of the eye is called:

a) Reflection

b) Refraction

c) Photosynthesis

d) Vision

Answer: d) Vision

Explanation: Vision involves the conversion of light energy into electrical signals in the retina of the eye.

65. The process by which excess water and waste products are removed from the blood in the kidneys is called:

a) Osmosis

b) Filtration

c) Diffusion

d) Active transport

Answer: b) Filtration

Explanation: Filtration is the process by which excess water and waste products are removed from the blood in the kidneys.

66. The process of releasing energy from glucose in the absence of oxygen to produce alcohol or lactic acid is called:

a) Fermentation

b) Glycolysis

c) Photosynthesis

d) Respiration

Answer: a) Fermentation

Explanation: Fermentation is the process of releasing energy from glucose in the absence of oxygen, producing alcohol or lactic acid.

67. Which of the following is a waste product produced during respiration in humans?

a) Oxygen

b) Glucose

c) Carbon dioxide

d) Water

Answer: c) Carbon dioxide

Explanation: Carbon dioxide is a waste product produced during respiration in humans.

68. The process of breaking down complex food substances into simpler forms is known as:

a) Assimilation

b) Digestion

c) Circulation

d) Respiration

Answer: b) Digestion

Explanation: Digestion is the process of breaking down complex food substances into simpler forms for absorption.

69. The function of the excretory system is to:

a) Digest food

b) Pump blood

c) Eliminate waste products

d) Exchange gases

Answer: c) Eliminate waste products

Explanation: The excretory system eliminates waste products from the body, such as urine and carbon dioxide.

70. Which of the following is an autotrophic mode of nutrition?

a) Herbivory

b) Carnivory

c) Photosynthesis

d) Parasitism

Answer: c) Photosynthesis

Explanation: Photosynthesis is an autotrophic mode of nutrition, where organisms produce their food using sunlight.

71. The energy currency of the cell is:

a) Glucose

b) ATP (Adenosine Triphosphate)

c) DNA

d) RNA

Answer: b) ATP (Adenosine Triphosphate)

Explanation: ATP is the energy currency of the cell, storing and releasing energy as needed.

72. Which of the following is NOT a raw material required for photosynthesis?

a) Carbon dioxide

b) Sunlight

c) Water

d) Nitrogen gas

Answer: d) Nitrogen gas

Explanation: Nitrogen gas is not a raw material required for photosynthesis. The essential raw materials are carbon dioxide, sunlight, and water.

73. The breakdown of pyruvate into carbon dioxide and water occurs in:

a) Cytoplasm

b) Mitochondria

c) Nucleus

d) Chloroplast

Answer: b) Mitochondria

Explanation: The breakdown of pyruvate into carbon dioxide and water occurs in the mitochondria during cellular respiration.

74. Which part of the plant carries out transpiration?

a) Leaves

b) Roots

c) Flowers

d) Stem

Answer: a) Leaves

Explanation: Transpiration primarily occurs through small openings called stomata on the leaves of the plant.

75. The process of maintaining a constant internal environment in the body is known as:

a) Osmosis

b) Homeostasis

c) Diffusion

d) Turgidity

Answer: b) Homeostasis

Explanation: Homeostasis is the process of maintaining a stable internal environment, despite external changes.

76. Which of the following is responsible for carrying oxygen in the bloodstream?

a) Platelets

b) White blood cells

c) Red blood cells

d) Plasma

Answer: c) Red blood cells

Explanation: Red blood cells contain hemoglobin, which carries oxygen in the bloodstream.

MCQs on Blood: Testing Your Knowledge about Blood Components

77. The breakdown of food into simpler substances by mechanical and chemical means takes place in the:

a) Stomach

b) Small intestine

c) Large intestine

d) Mouth

Answer: d) Mouth

Explanation: The process of digestion begins in the mouth, where food is broken down mechanically by chewing and chemically by enzymes in saliva.

78. The specialized cells responsible for carrying electrical signals in the nervous system are called:

a) Red blood cells

b) Nephrons

c) Neurons

d) Mitochondria

Answer: c) Neurons

Explanation: Neurons are specialized cells responsible for carrying electrical signals in the nervous system.

79. Which of the following is responsible for pumping blood throughout the body?

a) Heart

b) Brain

c) Liver

d) Lungs

Answer: a) Heart

Explanation: The heart is responsible for pumping blood and distributing it throughout the body.

80. The process of breakdown of glucose in the presence of oxygen to release energy is called:

a) Photosynthesis

b) Fermentation

c) Respiration

d) Transpiration

Answer: c) Respiration

Explanation: Respiration is the process of breaking down glucose in the presence of oxygen to release energy.

81. Which part of the human brain controls voluntary actions, intelligence, and consciousness?

a) Cerebrum

b) Cerebellum

c) Medulla oblongata

d) Thalamus

Answer: a) Cerebrum

Explanation: The cerebrum is responsible for voluntary actions, intelligence, and consciousness.

82. The process of breakdown of glucose in the absence of oxygen to release energy is called:

a) Photosynthesis

b) Fermentation

c) Respiration

d) Transpiration

Answer: b) Fermentation

Explanation: Fermentation is the process of breaking down glucose in the absence of oxygen to release energy.

83. Which of the following is responsible for breaking down complex carbohydrates into simpler sugars during digestion?

a) Salivary amylase

b) Pepsin

c) Trypsin

d) Lipase

Answer: a) Salivary amylase

Explanation: Salivary amylase is an enzyme that breaks down complex carbohydrates into simpler sugars in the mouth during digestion.

MCQs on Matter in Our Surroundings

84. The process of absorption of water and minerals from the soil by plant roots is known as:

a) Transpiration

b) Respiration

c) Osmosis

d) Absorption

Answer: d) Absorption

Explanation: Absorption is the process of taking up water and minerals from the soil by plant roots.

85. Which of the following is the powerhouse of the cell and is responsible for producing ATP (energy)?

a) Golgi apparatus

b) Mitochondria

c) Endoplasmic reticulum

d) Lysosomes

Answer: b) Mitochondria

Explanation: Mitochondria are the powerhouse of the cell and are responsible for producing ATP (energy).

86. The process of conversion of light energy into electrical signals in the retina of the eye is called:

a) Reflection

b) Refraction

c) Photosynthesis

d) Vision

Answer: d) Vision

Explanation: Vision involves the conversion of light energy into electrical signals in the retina of the eye.

87. The process by which excess water and waste products are removed from the blood in the kidneys is called:

a) Osmosis

b) Filtration

c) Diffusion

d) Active transport

Answer: b) Filtration

Explanation: Filtration is the process by which excess water and waste products are removed from the blood in the kidneys.

88. The process of releasing energy from glucose in the absence of oxygen to produce alcohol or lactic acid is called:

a) Fermentation

b) Glycolysis

c) Photosynthesis

d) Respiration

Answer: a) Fermentation

Explanation: Fermentation is the process of releasing energy from glucose in the absence of oxygen, producing alcohol or lactic acid.

89. Which of the following is a waste product produced during respiration in humans?

a) Oxygen

b) Glucose

c) Carbon dioxide

d) Water

Answer: c) Carbon dioxide

Explanation: Carbon dioxide is a waste product produced during respiration in humans.

90. The process of breaking down complex food substances into simpler forms is known as:

a) Assimilation

b) Digestion

c) Circulation

d) Respiration

Answer: b) Digestion

Explanation: Digestion is the process of breaking down complex food substances into simpler forms for absorption.

91. The function of the excretory system is to:

a) Digest food

b) Pump blood

c) Eliminate waste products

d) Exchange gases

Answer: c) Eliminate waste products

Explanation: The excretory system eliminates waste products from the body, such as urine and carbon dioxide.

92. Which of the following is an autotrophic mode of nutrition?

a) Herbivory

b) Carnivory

c) Photosynthesis

d) Parasitism

Answer: c) Photosynthesis

Explanation: Photosynthesis is an autotrophic mode of nutrition, where organisms produce their food using sunlight.

93. The energy currency of the cell is:

a) Glucose

b) ATP (Adenosine Triphosphate)

c) DNA

d) RNA

Answer: b) ATP (Adenosine Triphosphate)

Explanation: ATP is the energy currency of the cell, storing and releasing energy as needed.

94. Which of the following is NOT a raw material required for photosynthesis?

a) Carbon dioxide

b) Sunlight

c) Water

d) Nitrogen gas

Answer: d) Nitrogen gas

Explanation: Nitrogen gas is not a raw material required for photosynthesis. The essential raw materials are carbon dioxide, sunlight, and water.

95. The breakdown of pyruvate into carbon dioxide and water occurs in:

a) Cytoplasm

b) Mitochondria

c) Nucleus

d) Chloroplast

Answer: b) Mitochondria

Explanation: The breakdown of pyruvate into carbon dioxide and water occurs in the mitochondria during cellular respiration.

96. Which part of the plant carries out transpiration?

a) Leaves

b) Roots

c) Flowers

d) Stem

Answer: a) Leaves

Explanation: Transpiration primarily occurs through small openings called stomata on the leaves of the plant.

97. The process of maintaining a constant internal environment in the body is known as:

a) Osmosis

b) Homeostasis

c) Diffusion

d) Turgidity

Answer: b) Homeostasis

Explanation: Homeostasis is the process of maintaining a stable internal environment, despite external changes.

98. Which of the following is responsible for carrying oxygen in the bloodstream?

a) Platelets

b) White blood cells

c) Red blood cells

d) Plasma

Answer: c) Red blood cells

Explanation: Red blood cells contain hemoglobin, which carries oxygen in the bloodstream.

99. The breakdown of food into simpler substances by mechanical and chemical means takes place in the:

a) Stomach

b) Small intestine

c) Large intestine

d) Mouth

Answer: d) Mouth

Explanation: The process of digestion begins in the mouth, where food is broken down mechanically by chewing and chemically by enzymes in saliva.

100. The specialized cells responsible for carrying electrical signals in the nervous system are called:

a) Red blood cells

b) Nephrons

c) Neurons

d) Mitochondria

Answer: c) Neurons

Explanation: Neurons are specialized cells responsible for carrying electrical signals in the nervous system.

Life Processes Class 10 MCQ With Answers pdf

I hope these questions and explanations help you in your Class 10 studies on life processes!

In conclusion, life processes Class 10 MCQ covers vital concepts that form the foundation of biology. Understanding these processes is crucial for students to excel in their exams and appreciate the wonders of life around us. By grasping the intricacies of cellular respiration, photosynthesis, transportation, excretion, reproduction, growth, and control and coordination, students can gain a deeper insight into the fascinating world of living organisms. Remember to study thoroughly, explore additional resources, and practice MCQs to ace your exams successfully.