200+ MCQs ko 2 parts (100+100) mein .
📘 Part 1 (Q1–Q100)
Topics Covered:
- Nutrition
- Human Digestive System
- Respiration
- Human Respiratory System
- Transportation in Humans
- Blood, Lymph, Heart
- Transportation in Plants
📗 Part 2 (Q101–Q200)
Topics Covered:
- Excretion in Humans
- Excretion in Plants
- Mixed Concept Questions
- Assertion-Reason
- Case-Based Questions
- Previous Year Pattern Questions
- NCERT Line-Based Traps
- full chapter detail notes for board exam
- https://www.learnwithafsa.online/2026/05/life-processes-class-10-notes.html
Life Processes MCQ Test (Part 1: Q1–Q20)
Q1. Which enzyme is present in saliva?
A) Pepsin B) Trypsin C) Salivary amylase D) Lipase
✅ Answer: C
📖 Salivary amylase starts digestion of starch in the mouth.
Q2. The inner lining of the stomach secretes:
A) Bile B) Gastric juice C) Pancreatic juice D) Saliva
✅ Answer: B
📖 Gastric glands secrete HCl, pepsin and mucus.
Q3. Which acid is present in gastric juice?
A) Sulphuric acid B) Nitric acid C) Hydrochloric acid D) Acetic acid
✅ Answer: C
Q4. Bile juice is produced by:
A) Pancreas B) Liver C) Stomach D) Gall bladder
✅ Answer: B
Q5. The largest gland in the human body is:
A) Pancreas B) Thyroid C) Liver D) Pituitary
✅ Answer: C
Q6. Digestion of proteins begins in:
A) Mouth B) Stomach C) Small intestine D) Large intestine
✅ Answer: B
Q7. The functional unit of kidney is:
A) Neuron B) Nephron C) Alveolus D) Villus
✅ Answer: B
Q8. Exchange of gases takes place in:
A) Trachea B) Bronchi C) Alveoli D) Larynx
✅ Answer: C
Q9. Which blood vessel carries oxygenated blood from lungs to heart?
A) Pulmonary artery B) Aorta C) Pulmonary vein D) Vena cava
✅ Answer: C
Q10. Human heart has:
A) 2 chambers B) 3 chambers C) 4 chambers D) 5 chambers
✅ Answer: C
Q11. Blood pressure is measured using:
A) Stethoscope B) Thermometer C) Sphygmomanometer D) Barometer
✅ Answer: C
Q12. Which pigment carries oxygen in blood?
A) Melanin B) Haemoglobin C) Chlorophyll D) Myoglobin
✅ Answer: B
Q13. Double circulation is found in:
A) Fish B) Frog C) Human D) Shark
✅ Answer: C
Q14. Water is transported in plants through:
A) Phloem B) Xylem C) Cortex D) Epidermis
✅ Answer: B
Q15. Food is transported in plants by:
A) Xylem B) Phloem C) Cambium D) Cortex
✅ Answer: B
Q16. The energy currency of the cell is:
A) DNA B) ATP C) RNA D) ADP
✅ Answer: B
Q17. Aerobic respiration occurs in:
A) Cytoplasm only B) Mitochondria C) Nucleus D) Ribosome
✅ Answer: B
Q18. The end products of aerobic respiration are:
A) Alcohol + CO₂ B) Lactic acid C) CO₂ + H₂O + Energy D) Glucose
✅ Answer: C
Q19. Which chamber of the heart pumps oxygenated blood to the body?
A) Right atrium B) Right ventricle C) Left atrium D) Left ventricle
✅ Answer: D
Q20. The filtration of blood occurs in:
A) Ureter B) Urinary bladder C) Nephron D) Urethra
✅ Answer: C
🔥 Important PYQ Traps
- Liver produces bile; gall bladder stores it.
- Pulmonary vein carries oxygenated blood (exception).
- Pulmonary artery carries deoxygenated blood (exception).
- Nephron = functional unit of kidney.
- Alveoli = site of gas exchange.
- Xylem → water transport.
- Phloem → food transport
📘 Life Processes MCQs (Part 1 Continued: Q21–Q50)
NCERT Based | PYQ Pattern | Answers + Explanations
Q21. Which part of the alimentary canal is the longest?
A) Stomach
B) Oesophagus
C) Small intestine
D) Large intestine✅ Answer: C
📖 Small intestine is about 6–7 m long and is the main site of digestion and absorption.
Q22. Villi are present in:
A) Stomach
B) Small intestine
C) Large intestine
D) Oesophagus✅ Answer: B
📖 Villi increase the surface area for absorption of digested food.
Q23. Which enzyme digests proteins in the stomach?
A) Amylase
B) Lipase
C) Pepsin
D) Maltase✅ Answer: C
Q24. Which nutrient is mainly digested by lipase?
A) Protein
B) Fat
C) Starch
D) Vitamins✅ Answer: B
Q25. Anaerobic respiration in muscles produces:
A) Alcohol
B) Carbon dioxide
C) Lactic acid
D) Glucose✅ Answer: C
Q26. The process of breaking down food to release energy is:
A) Digestion
B) Respiration
C) Circulation
D) Excretion✅ Answer: B
Q27. The blood vessel carrying blood from heart to lungs is:
A) Aorta
B) Pulmonary artery
C) Pulmonary vein
D) Vena cava✅ Answer: B
Q28. Which component of blood helps in clotting?
A) RBCs
B) WBCs
C) Plasma
D) Platelets✅ Answer: D
Q29. White blood cells help in:
A) Oxygen transport
B) Blood clotting
C) Defense against infection
D) Food transport✅ Answer: C
Q30. The liquid part of blood is:
A) Plasma
B) Serum
C) Lymph
D) Platelets✅ Answer: A
Q31. Which chamber receives oxygenated blood from lungs?
A) Right atrium
B) Right ventricle
C) Left atrium
D) Left ventricle✅ Answer: C
Q32. The valve between left atrium and left ventricle prevents:
A) Oxygen loss
B) Backflow of blood
C) Clotting
D) Mixing of blood✅ Answer: B
Q33. Blood pressure of a healthy adult is approximately:
A) 80/120 mm Hg
B) 120/80 mm Hg
C) 140/100 mm Hg
D) 100/60 mm Hg✅ Answer: B
Q34. Which tissue transports food in plants?
A) Xylem
B) Phloem
C) Epidermis
D) Cortex✅ Answer: B
Q35. Translocation in plants occurs through:
A) Xylem
B) Phloem
C) Stomata
D) Root hairs✅ Answer: B
Q36. Loss of water in the form of vapour from aerial parts is:
A) Respiration
B) Guttation
C) Transpiration
D) Photosynthesis✅ Answer: C
Q37. Opening and closing of stomata is controlled by:
A) Root hairs
B) Guard cells
C) Xylem cells
D) Phloem cells✅ Answer: B
Q38. The main nitrogenous waste in humans is:
A) Ammonia
B) Urea
C) Uric acid
D) Carbon dioxide✅ Answer: B
Q39. Urine formation occurs in:
A) Ureter
B) Urinary bladder
C) Nephron
D) Urethra✅ Answer: C
Q40. The tube carrying urine from kidney to bladder is:
A) Urethra
B) Nephron
C) Ureter
D) Renal artery✅ Answer: C
Q41. The organ that stores urine is:
A) Kidney
B) Ureter
C) Urinary bladder
D) Urethra✅ Answer: C
Q42. Which process removes metabolic wastes from the body?
A) Digestion
B) Respiration
C) Excretion
D) Circulation✅ Answer: C
Q43. Lymph mainly functions in:
A) Oxygen transport
B) Food transport only
C) Returning tissue fluid to blood
D) Digestion✅ Answer: C
Q44. Which blood vessel has the thickest wall?
A) Vein
B) Capillary
C) Artery
D) Venule✅ Answer: C
Q45. Exchange of substances between blood and cells occurs through:
A) Arteries
B) Veins
C) Capillaries
D) Aorta✅ Answer: C
Q46. Which of the following is NOT a function of blood?
A) Transport of gases
B) Transport of nutrients
C) Transport of hormones
D) Photosynthesis✅ Answer: D
Q47. During vigorous exercise, muscles perform:
A) Only aerobic respiration
B) Only photosynthesis
C) Anaerobic respiration also
D) No respiration✅ Answer: C
Q48. The movement of food from leaves to other parts of the plant is called:
A) Transpiration
B) Translocation
C) Absorption
D) Respiration✅ Answer: B
Q49. Which structure prevents food from entering the windpipe?
A) Trachea
B) Bronchus
C) Epiglottis
D) Alveolus✅ Answer: C
Q50. Which statement is correct?
A) Xylem transports food
B) Phloem transports water
C) Xylem transports water and minerals
D) Stomata transport food✅ Answer: C
📖 Explanation: Xylem carries water and minerals from roots to aerial parts of the plant.
🎯 High-Yield NCERT Facts (Frequently Asked)
✅ Villi → Absorption of food
✅ Pepsin → Protein digestion
✅ Lipase → Fat digestion
✅ Platelets → Blood clotting
✅ Pulmonary artery → Deoxygenated blood
✅ Pulmonary vein → Oxygenated blood
✅ Nephron → Functional unit of kidney
✅ Guard cells → Control stomata
✅ Urea → Main nitrogenous waste in humans
✅ Phloem → Translocation of food📘 Life Processes MCQs (Part 1 Continued: Q51–Q100)
NCERT Based | PYQ Pattern | Tricky Questions with Answers & Explanations
Q51. Which chamber of the heart has the thickest muscular wall?
A) Right atrium
B) Left atrium
C) Right ventricle
D) Left ventricle✅ Answer: D
📖 Left ventricle pumps blood to the entire body, so it has the thickest wall.Q52. Which blood vessel carries oxygenated blood to all body parts?
A) Pulmonary artery
B) Aorta
C) Vena cava
D) Pulmonary vein✅ Answer: B
Q53. The respiratory pigment present in RBCs is:
A) Chlorophyll
B) Myoglobin
C) Haemoglobin
D) Melanin✅ Answer: C
Q54. Which process occurs in alveoli?
A) Digestion
B) Gas exchange
C) Filtration
D) Absorption of nutrients✅ Answer: B
Q55. The opening of stomata is mainly due to:
A) Shrinkage of guard cells
B) Turgidity of guard cells
C) Death of guard cells
D) Growth of xylem✅ Answer: B
Q56. Which of the following is an excretory product in plants?
A) Oxygen
B) Resins
C) Gums
D) All of these✅ Answer: D
Q57. The process of taking in oxygen and giving out carbon dioxide is:
A) Digestion
B) Breathing
C) Excretion
D) Circulation✅ Answer: B
Q58. The actual breakdown of food to release energy occurs during:
A) Breathing
B) Ventilation
C) Respiration
D) Transpiration✅ Answer: C
Q59. Which organ secretes bile?
A) Gall bladder
B) Liver
C) Pancreas
D) Stomach✅ Answer: B
Q60. Gall bladder mainly functions to:
A) Produce bile
B) Store bile
C) Digest fats
D) Absorb glucose✅ Answer: B
Q61. Pancreatic juice contains enzymes for digestion of:
A) Carbohydrates only
B) Proteins only
C) Fats only
D) Carbohydrates, proteins and fats✅ Answer: D
Q62. Which structure prevents backflow of blood in veins?
A) Septum
B) Valves
C) Platelets
D) Capillaries✅ Answer: B
Q63. The separation between right and left sides of the heart is due to:
A) Valve
B) Septum
C) Aorta
D) Atrium✅ Answer: B
Q64. Which of the following does NOT contain blood?
A) Artery
B) Vein
C) Capillary
D) Trachea✅ Answer: D
Q65. Which gas is transported mainly by haemoglobin?
A) Nitrogen
B) Oxygen
C) Hydrogen
D) Helium✅ Answer: B
Q66. Root pressure helps in:
A) Food transport
B) Water movement upward
C) Photosynthesis
D) Respiration✅ Answer: B
Q67. Which part of nephron performs filtration?
A) Loop of Henle
B) Collecting duct
C) Bowman's capsule and glomerulus
D) Ureter✅ Answer: C
Q68. Reabsorption of useful substances occurs mainly in:
A) Urethra
B) Tubules of nephron
C) Urinary bladder
D) Ureter✅ Answer: B
Q69. Assertion (A): Arteries have thick elastic walls.
Reason (R): Blood flows through them under high pressure.
A) Both true and R explains A
B) Both true but R doesn't explain A
C) A true, R false
D) A false, R true✅ Answer: A
Q70. Assertion (A): Veins have valves.
Reason (R): Blood pressure in veins is low.
A) Both true and R explains A
B) Both true but R doesn't explain A
C) A true, R false
D) A false, R true✅ Answer: A
Q71. Which blood group is called the universal donor?
A) A
B) B
C) AB
D) O✅ Answer: D
Q72. Which blood group is called the universal recipient?
A) O
B) AB
C) A
D) B✅ Answer: B
Q73. The contraction of the heart is called:
A) Diastole
B) Systole
C) Diffusion
D) Osmosis✅ Answer: B
Q74. The relaxation phase of heart is:
A) Systole
B) Diastole
C) Respiration
D) Ventilation✅ Answer: B
Q75. Which of the following transports minerals from roots?
A) Phloem
B) Xylem
C) Stomata
D) Cortex✅ Answer: B
Q76. In humans, digestion is completed in:
A) Mouth
B) Stomach
C) Small intestine
D) Large intestine✅ Answer: C
Q77. Which vitamin is produced by bacteria in the large intestine?
A) Vitamin A
B) Vitamin C
C) Vitamin K
D) Vitamin D✅ Answer: C
Q78. The absorption of water mainly occurs in:
A) Stomach
B) Small intestine
C) Large intestine
D) Oesophagus✅ Answer: C
Q79. Which process requires ATP?
A) Diffusion only
B) Osmosis only
C) Active transport
D) Evaporation✅ Answer: C
Q80. Food moves through oesophagus by:
A) Diffusion
B) Peristalsis
C) Osmosis
D) Filtration✅ Answer: B
Q81. Which of the following is NOT a digestive enzyme?
A) Pepsin
B) Trypsin
C) Lipase
D) Bile✅ Answer: D
📖 Bile helps emulsify fats but is not an enzyme.
Q82. Emulsification of fats occurs in:
A) Stomach
B) Mouth
C) Small intestine
D) Large intestine✅ Answer: C
Q83. Which structure increases absorption area in the small intestine?
A) Alveoli
B) Villi
C) Nephrons
D) Bronchi✅ Answer: B
Q84. The transport of oxygen in blood is mainly done by:
A) Plasma
B) WBCs
C) RBCs
D) Platelets✅ Answer: C
Q85. Which component fights infection?
A) RBCs
B) WBCs
C) Platelets
D) Plasma✅ Answer: B
Q86. Which structure filters blood in kidney?
A) Alveolus
B) Villus
C) Glomerulus
D) Atrium✅ Answer: C
Q87. The blood entering kidneys is carried by:
A) Renal vein
B) Renal artery
C) Ureter
D) Urethra✅ Answer: B
Q88. Which organ removes excess water and salts?
A) Heart
B) Liver
C) Kidney
D) Pancreas✅ Answer: C
Q89. The process of losing water vapour through stomata is:
A) Guttation
B) Respiration
C) Transpiration
D) Digestion✅ Answer: C
Q90. Which force is mainly responsible for ascent of sap?
A) Gravity
B) Transpiration pull
C) Diffusion
D) Osmosis✅ Answer: B
Q91. The exchange of gases in plants occurs mainly through:
A) Xylem
B) Phloem
C) Stomata and lenticels
D) Roots only✅ Answer: C
Q92. Which process removes CO₂ from the body?
A) Digestion
B) Exhalation
C) Circulation
D) Filtration✅ Answer: B
Q93. Which organ is common to both digestive and respiratory systems?
A) Pharynx
B) Stomach
C) Alveoli
D) Liver✅ Answer: A
Q94. During inhalation, ribs move:
A) Downward and inward
B) Upward and outward
C) Downward and outward
D) No movement✅ Answer: B
Q95. During exhalation, diaphragm becomes:
A) Flat
B) Contracted
C) Dome-shaped
D) Enlarged✅ Answer: C
Q96. Which of the following is correctly matched?
A) Xylem – Food transport
B) Phloem – Water transport
C) Nephron – Kidney unit
D) Alveoli – Digestion✅ Answer: C
Q97. Which life process is essential for obtaining energy from food?
A) Excretion
B) Respiration
C) Transportation
D) Transpiration✅ Answer: B
Q98. Blood is a type of:
A) Epithelial tissue
B) Connective tissue
C) Nervous tissue
D) Muscular tissue✅ Answer: B
Q99. Which one is the correct sequence of urine flow?
A) Kidney → Ureter → Urinary Bladder → Urethra
B) Kidney → Urethra → Ureter → Bladder
C) Ureter → Kidney → Bladder → Urethra
D) Kidney → Bladder → Ureter → Urethra✅ Answer: A
Q100. Which statement is correct?
A) Phloem transports water only
B) Xylem transports food only
C) Nephron is the functional unit of kidney
D) Alveoli are present in heart✅ Answer: C
📖 Explanation: Nephron is the structural and functional unit of the kidney and is one of the most frequently asked NCERT facts.
🚀 Quick Revision of Most Repeated PYQs
- Nephron = Functional unit of kidney
- Alveoli = Site of gas exchange
- Villi = Site of absorption
- Pepsin = Protein digestion
- Bile = Emulsification of fats
- Xylem = Water & mineral transport
- Phloem = Food transport
- Left ventricle = Thickest chamber
- Pulmonary vein = Oxygenated blood
- Pulmonary artery = Deoxygenated blood
- Transpiration pull = Ascent of sap
- RBC = Oxygen transport
- WBC = Immunity
- Platelets = Clotting
📗 Life Processes MCQs (Part 2: Q101–Q150)
NCERT Based | PYQ-Inspired | Assertion-Reason | Tricky Questions
Q101. Assertion (A): Photosynthesis and respiration are complementary processes.
Reason (R): Products of one are raw materials for the other.
A) Both A and R are true and R explains A
B) Both true but R doesn't explain A
C) A true, R false
D) A false, R true✅ Answer: A
📖 Products of photosynthesis (glucose, O₂) are used in respiration, while CO₂ and H₂O from respiration are used in photosynthesis.
Q102. Which of the following is absorbed without digestion?
A) Proteins
B) Starch
C) Vitamins
D) Fats✅ Answer: C
Q103. Which part of alimentary canal receives bile and pancreatic juice?
A) Stomach
B) Duodenum
C) Ileum
D) Colon✅ Answer: B
Q104. The semi-digested food leaving the stomach is called:
A) Bolus
B) Chyme
C) Faeces
D) Plasma✅ Answer: B
Q105. Which enzyme converts starch into maltose?
A) Lipase
B) Pepsin
C) Amylase
D) Trypsin✅ Answer: C
Q106. Assertion (A): Human heart prevents mixing of oxygenated and deoxygenated blood.
Reason (R): Human heart is four-chambered.
A) Both true and R explains A
B) Both true but R doesn't explain A
C) A true, R false
D) A false, R true✅ Answer: A
Q107. Which chamber receives deoxygenated blood from the body?
A) Left atrium
B) Left ventricle
C) Right atrium
D) Right ventricle✅ Answer: C
Q108. Which vessel carries blood from right ventricle to lungs?
A) Aorta
B) Pulmonary artery
C) Pulmonary vein
D) Vena cava✅ Answer: B
Q109. Blood consists of:
A) Plasma only
B) RBCs only
C) Plasma and blood cells
D) Platelets only✅ Answer: C
Q110. Which component transports hormones?
A) RBCs
B) Plasma
C) Platelets
D) WBCs✅ Answer: B
Q111. Which structure in plants is mainly responsible for water absorption?
A) Root cap
B) Root hairs
C) Cortex
D) Phloem✅ Answer: B
Q112. Transpiration helps in:
A) Photosynthesis only
B) Water absorption only
C) Ascent of sap and cooling
D) Digestion✅ Answer: C
Q113. Which nitrogenous waste requires maximum water for excretion?
A) Urea
B) Uric acid
C) Ammonia
D) Creatinine✅ Answer: C
Q114. Human beings are:
A) Ammonotelic
B) Uricotelic
C) Ureotelic
D) None✅ Answer: C
Q115. Which process is responsible for movement of food through alimentary canal?
A) Diffusion
B) Osmosis
C) Peristalsis
D) Filtration✅ Answer: C
Q116. The epiglottis prevents food from entering:
A) Oesophagus
B) Trachea
C) Stomach
D) Intestine✅ Answer: B
Q117. Which digestive juice does not contain enzymes?
A) Saliva
B) Gastric juice
C) Bile juice
D) Pancreatic juice✅ Answer: C
Q118. Bile helps in digestion by:
A) Breaking proteins
B) Breaking starch
C) Emulsifying fats
D) Producing glucose✅ Answer: C
Q119. The blood leaving kidneys through renal vein is:
A) Purified blood
B) Oxygen-free blood only
C) Undigested blood
D) Lymph✅ Answer: A
Q120. Which structure is known as the filtration unit of kidney?
A) Neuron
B) Nephron
C) Villus
D) Alveolus✅ Answer: B
Q121. Assertion (A): Veins carry blood toward the heart.
Reason (R): Veins always carry deoxygenated blood.
A) A true, R false
B) A false, R true
C) Both true
D) Both false✅ Answer: A
📖 Pulmonary vein carries oxygenated blood.
Q122. Which process releases the highest amount of energy?
A) Anaerobic respiration
B) Fermentation
C) Aerobic respiration
D) Digestion✅ Answer: C
Q123. ATP is synthesized mainly in:
A) Ribosomes
B) Nucleus
C) Mitochondria
D) Golgi body✅ Answer: C
Q124. Which gas is released during photosynthesis?
A) CO₂
B) O₂
C) N₂
D) H₂✅ Answer: B
Q125. The normal lifespan of human RBCs is about:
A) 12 days
B) 60 days
C) 120 days
D) 240 days✅ Answer: C
Q126. Which blood cells lack nucleus in humans?
A) WBCs
B) RBCs
C) Platelets only
D) Lymphocytes✅ Answer: B
Q127. Which blood cells directly help in immunity?
A) RBCs
B) WBCs
C) Platelets
D) Plasma✅ Answer: B
Q128. Which vessel has the lowest blood pressure?
A) Aorta
B) Arteries
C) Veins
D) Capillaries✅ Answer: C
Q129. The movement of molecules from high concentration to low concentration is:
A) Osmosis
B) Diffusion
C) Active transport
D) Filtration✅ Answer: B
Q130. Osmosis is movement of:
A) Solute molecules
B) Water molecules
C) Minerals only
D) Food only✅ Answer: B
Q131. Which tissue transports food in both directions?
A) Xylem
B) Phloem
C) Epidermis
D) Cork✅ Answer: B
Q132. Water transport in xylem is generally:
A) Bidirectional
B) Multidirectional
C) Upward only
D) Downward only✅ Answer: C
Q133. Which organ removes carbon dioxide?
A) Kidney
B) Skin
C) Lungs
D) Liver✅ Answer: C
Q134. Sweat glands help in:
A) Digestion
B) Excretion and temperature regulation
C) Respiration
D) Circulation✅ Answer: B
Q135. Which is NOT a function of liver?
A) Bile secretion
B) Detoxification
C) Storage of glycogen
D) Urine formation✅ Answer: D
Q136. The opening of stomata occurs when guard cells become:
A) Flaccid
B) Dead
C) Turgid
D) Dry✅ Answer: C
Q137. Which process helps maintain water balance in plants?
A) Digestion
B) Transpiration
C) Fermentation
D) Excretion✅ Answer: B
Q138. Which structure prevents mixing of blood in humans?
A) Atrium
B) Septum
C) Valve
D) Capillary✅ Answer: B
Q139. Double circulation means blood passes through the heart:
A) Once in one cycle
B) Twice in one cycle
C) Thrice in one cycle
D) Four times in one cycle✅ Answer: B
Q140. Which process forms urine?
A) Filtration, reabsorption, secretion
B) Digestion, absorption, assimilation
C) Respiration, diffusion, excretion
D) Ventilation, diffusion, circulation✅ Answer: A
Q141. Which part of nephron is cup-shaped?
A) Loop of Henle
B) Bowman's capsule
C) Collecting duct
D) Ureter✅ Answer: B
Q142. Excess amino acids are converted into:
A) Glucose only
B) Urea and other products
C) Vitamins
D) Starch✅ Answer: B
Q143. The largest amount of digestion occurs in:
A) Mouth
B) Stomach
C) Small intestine
D) Large intestine✅ Answer: C
Q144. Which enzyme acts in acidic medium?
A) Pepsin
B) Amylase
C) Trypsin
D) Lipase✅ Answer: A
Q145. Which enzyme acts in alkaline medium?
A) Pepsin
B) Trypsin
C) HCl
D) Mucus✅ Answer: B
Q146. Which process is directly responsible for absorption of water by roots?
A) Diffusion
B) Osmosis
C) Respiration
D) Photosynthesis✅ Answer: B
Q147. Which component of blood helps transport nutrients?
A) Plasma
B) RBCs
C) Platelets
D) WBCs✅ Answer: A
Q148. Which organ system is directly responsible for removal of metabolic wastes?
A) Digestive system
B) Respiratory system
C) Excretory system
D) Circulatory system✅ Answer: C
Q149. The main excretory organ in humans is:
A) Liver
B) Skin
C) Kidney
D) Lung✅ Answer: C
Q150. Which statement is CORRECT?
A) Xylem transports food
B) Phloem transports minerals only
C) Nephron is the structural and functional unit of kidney
D) Alveoli are present in stomach✅ Answer: C
📖.📘 Life Processes MCQs (Part 2 Continued: Q151–Q200)
