1. 🌿 What is the primary site of photosynthesis in plants?
- A. Roots
- B. Stems
- C. Leaves
- D. Flowers
🔍 Show Answer
✅ C. Leaves
2. 🫀 Which part of the human heart receives deoxygenated blood?
- A. Left atrium
- B. Right atrium
- C. Left ventricle
- D. Right ventricle
🔍 Show Answer
✅ B. Right atrium
3. 💨 What is the function of stomata in leaves?
- A. Water transport
- B. Photosynthesis
- C. Gas exchange
- D. Nutrient absorption
🔍 Show Answer
✅ C. Gas exchange
4. 🧪 Which enzyme breaks down starch in the mouth?
- A. Pepsin
- B. Amylase
- C. Lipase
- D. Trypsin
🔍 Show Answer
✅ B. Amylase
5. 💧 Which structure in plants conducts water?
- A. Phloem
- B. Xylem
- C. Cambium
- D. Cortex
🔍 Show Answer
✅ B. Xylem
6. 🍽️ Which of the following organs secretes bile?
- A. Pancreas
- B. Gall bladder
- C. Liver
- D. Small intestine
🔍 Show Answer
✅ C. Liver
7. 🔁 What is the main function of the large intestine?
- A. Digestion of fats
- B. Absorption of water
- C. Absorption of protein
- D. Mixing of food
🔍 Show Answer
✅ B. Absorption of water
8. 🔬 Which blood vessel carries oxygenated blood from lungs to heart?
- A. Pulmonary artery
- B. Pulmonary vein
- C. Aorta
- D. Vena cava
🔍 Show Answer
✅ B. Pulmonary vein
9. 🌡️ Which part of the nephron is responsible for filtration?
- A. Loop of Henle
- B. Tubule
- C. Glomerulus
- D. Collecting duct
🔍 Show Answer
✅ C. Glomerulus
10. 🌬️ Which gas is mainly exhaled during respiration?
- A. Oxygen
- B. Nitrogen
- C. Carbon dioxide
- D. Hydrogen
🔍 Show Answer
✅ C. Carbon dioxide
11. 🧬 Which life process provides energy to the body?
- A. Respiration
- B. Excretion
- C. Digestion
- D. Circulation
🔍 Show Answer
✅ A. Respiration
12. 🍞 Which end products are formed during anaerobic respiration in yeast?
- A. Carbon dioxide and water
- B. Lactic acid and energy
- C. Ethanol and carbon dioxide
- D. Glucose and water
🔍 Show Answer
✅ C. Ethanol and carbon dioxide
13. 🔬 Where does the breakdown of glucose into pyruvate occur in cells?
- A. Nucleus
- B. Mitochondria
- C. Cytoplasm
- D. Ribosomes
🔍 Show Answer
✅ C. Cytoplasm
14. 🌡️ Which form of respiration occurs in human muscles during deficiency of oxygen?
- A. Aerobic respiration
- B. Anaerobic respiration
- C. Photosynthesis
- D. Fermentation
🔍 Show Answer
✅ B. Anaerobic respiration
15. 🧪 Which substance is used to test the presence of starch in leaves?
- A. Lime water
- B. Iodine solution
- C. Alcohol
- D. Benedict’s solution
🔍 Show Answer
✅ B. Iodine solution
16. 🥬 Why are chloroplasts important for photosynthesis?
- A. They store food
- B. They absorb minerals
- C. They contain chlorophyll
- D. They release oxygen
🔍 Show Answer
✅ C. They contain chlorophyll
17. 🫀 Which valve prevents the backflow of blood into the left atrium?
- A. Tricuspid valve
- B. Semilunar valve
- C. Bicuspid (mitral) valve
- D. Aortic valve
🔍 Show Answer
✅ C. Bicuspid (mitral) valve
18. 🚰 Which part of nephron collects the urine?
- A. Bowman’s capsule
- B. Tubule
- C. Collecting duct
- D. Glomerulus
🔍 Show Answer
✅ C. Collecting duct
19. 🌿 Which pigment captures light energy for photosynthesis?
- A. Haemoglobin
- B. Keratin
- C. Chlorophyll
- D. Melanin
🔍 Show Answer
✅ C. Chlorophyll
20. 🩸 What is the function of hemoglobin in blood?
- A. Clotting
- B. Immunity
- C. Oxygen transport
- D. Digestion
🔍 Show Answer
✅ C. Oxygen transport
21. 🔁 What is the correct pathway of blood circulation in humans?
- A. Heart → Body → Lungs
- B. Body → Heart → Lungs → Heart → Body
- C. Lungs → Heart → Body
- D. Heart → Lungs → Heart → Body
🔍 Show Answer
✅ B. Body → Heart → Lungs → Heart → Body
22. 🌾 What is translocation in plants?
- A. Water absorption
- B. Removal of waste
- C. Transport of food
- D. Exchange of gases
🔍 Show Answer
✅ C. Transport of food
23. 🧬 Which process releases energy from food inside the cells?
- A. Digestion
- B. Excretion
- C. Respiration
- D. Circulation
🔍 Show Answer
✅ C. Respiration
24. 🔍 Which blood vessels carry blood away from the heart?
- A. Veins
- B. Arteries
- C. Capillaries
- D. Vena cava
🔍 Show Answer
✅ B. Arteries
25. 💨 Which part of the respiratory system is the site of gas exchange?
- A. Bronchi
- B. Alveoli
- C. Trachea
- D. Larynx
🔍 Show Answer
✅ B. Alveoli
26. 🩻 In which form is food absorbed into the blood from small intestine?
- A. Complex proteins
- B. Simple sugars, amino acids, fatty acids
- C. Fats and oils
- D. Water only
🔍 Show Answer
✅ B. Simple sugars, amino acids, fatty acids
27. 🧫 Which part of nephron filters the blood?
- A. Tubule
- B. Collecting duct
- C. Glomerulus
- D. Loop of Henle
🔍 Show Answer
✅ C. Glomerulus
28. 🧴 Which organ removes nitrogenous waste from the human body?
- A. Liver
- B. Kidney
- C. Skin
- D. Lungs
🔍 Show Answer
✅ B. Kidney
29. 🧘♂️ What is the purpose of breathing?
- A. Absorption of food
- B. Excretion of urea
- C. Intake of oxygen for cellular respiration
- D. Movement of muscles
🔍 Show Answer
✅ C. Intake of oxygen for cellular respiration
30. 🔎 What is the basic unit of kidney that filters blood?
- A. Ureter
- B. Nephron
- C. Glomerulus
- D. Bowman’s capsule
🔍 Show Answer
✅ B. Nephron
31. 💉 Which part of the circulatory system prevents mixing of oxygenated and deoxygenated blood in humans?
- A. Right atrium
- B. Left ventricle
- C. Septum
- D. Valves
🔍 Show Answer
✅ C. Septum
32. 🌱 What is the ultimate source of energy for autotrophs?
- A. Soil
- B. Sunlight
- C. Water
- D. Air
🔍 Show Answer
✅ B. Sunlight
33. 🧪 What is the main function of bile in digestion?
- A. Digest proteins
- B. Digest carbohydrates
- C. Emulsify fats
- D. Absorb minerals
🔍 Show Answer
✅ C. Emulsify fats
34. 🧬 Which molecules are produced during aerobic respiration?
- A. CO2 and H2O
- B. Lactic acid and CO2
- C. Alcohol and CO2
- D. Glucose and ATP
🔍 Show Answer
✅ A. CO2 and H2O
35. 💨 What structure helps guard cells to open and close stomata?
- A. Xylem
- B. Phloem
- C. Chloroplast
- D. Turgor pressure
🔍 Show Answer
✅ D. Turgor pressure
36. 🧫 Which of the following carries oxygenated blood?
- A. Pulmonary vein
- B. Pulmonary artery
- C. Vena cava
- D. Right atrium
🔍 Show Answer
✅ A. Pulmonary vein
37. 🧃 What does pancreatic juice help digest?
- A. Carbohydrates only
- B. Proteins and fats only
- C. Carbohydrates, proteins, and fats
- D. Minerals only
🔍 Show Answer
✅ C. Carbohydrates, proteins, and fats
38. 🧬 Where does aerobic respiration occur inside the cell?
- A. Cytoplasm
- B. Ribosome
- C. Mitochondria
- D. Nucleus
🔍 Show Answer
✅ C. Mitochondria
39. 🔁 What is the function of blood plasma?
- A. Carry oxygen
- B. Fight infections
- C. Carry nutrients and hormones
- D. Help clot blood
🔍 Show Answer
✅ C. Carry nutrients and hormones
40. 🌬️ Which gas is essential for aerobic respiration?
- A. Nitrogen
- B. Carbon dioxide
- C. Hydrogen
- D. Oxygen
🔍 Show Answer
✅ D. Oxygen
41. 🍃 Which process occurs in the chloroplast?
- A. Respiration
- B. Transpiration
- C. Photosynthesis
- D. Digestion
🔍 Show Answer
✅ C. Photosynthesis
42. 🧬 Which organism can perform photosynthesis and respiration both?
- A. Fungi
- B. Bacteria
- C. Green plants
- D. Virus
🔍 Show Answer
✅ C. Green plants
43. 🥤 Which process leads to loss of water from aerial parts of plant?
- A. Respiration
- B. Translocation
- C. Photosynthesis
- D. Transpiration
🔍 Show Answer
✅ D. Transpiration
44. 🧬 What is the energy currency of the cell?
- A. DNA
- B. Glucose
- C. ATP
- D. Protein
🔍 Show Answer
✅ C. ATP
45. 🧠 Which organ filters urea from the blood?
- A. Liver
- B. Kidney
- C. Lungs
- D. Skin
🔍 Show Answer
✅ B. Kidney
46. 🧫 Which plant tissue helps in transport of water?
- A. Xylem
- B. Phloem
- C. Parenchyma
- D. Collenchyma
🔍 Show Answer
✅ A. Xylem
47. 💧 Which organ removes excess water and salts?
- A. Kidney
- B. Lungs
- C. Intestine
- D. Pancreas
🔍 Show Answer
✅ A. Kidney
48. 🫀 Which part of the heart pumps oxygenated blood to the body?
- A. Right atrium
- B. Left atrium
- C. Right ventricle
- D. Left ventricle
🔍 Show Answer
✅ D. Left ventricle
49. 🧪 Which of the following is not a function of the liver?
- A. Secretion of bile
- B. Urea formation
- C. Blood filtration
- D. Storage of glycogen
🔍 Show Answer
✅ C. Blood filtration
50. 🌱 In plants, food is transported through:
- A. Xylem
- B. Phloem
- C. Cambium
- D. Cortex
🔍 Show Answer
✅ B. Phloem
51. 🧬 What is the main nitrogenous waste in humans?
- A. Ammonia
- B. Nitrite
- C. Uric acid
- D. Urea
🔍 Show Answer
✅ D. Urea
52. 🌿 Which plant part loses water through transpiration?
- A. Root hairs
- B. Leaves
- C. Stem
- D. Flowers
🔍 Show Answer
✅ B. Leaves
53. 🧪 What is the role of the small intestine in digestion?
- A. Only absorption
- B. Mechanical digestion
- C. Absorption and enzymatic digestion
- D. Water reabsorption only
🔍 Show Answer
✅ C. Absorption and enzymatic digestion
54. 💉 Which blood vessel carries deoxygenated blood from the body to the heart?
- A. Aorta
- B. Pulmonary artery
- C. Vena cava
- D. Pulmonary vein
🔍 Show Answer
✅ C. Vena cava
55. 🌱 What is the raw material required for photosynthesis?
- A. Carbon dioxide and oxygen
- B. Water and glucose
- C. Water and carbon dioxide
- D. Water and nitrogen
🔍 Show Answer
✅ C. Water and carbon dioxide
56. 💨 The removal of metabolic waste from the body is called:
- A. Transpiration
- B. Respiration
- C. Excretion
- D. Digestion
🔍 Show Answer
✅ C. Excretion
57. 🧬 Which enzyme digests protein in the stomach?
- A. Amylase
- B. Pepsin
- C. Lipase
- D. Trypsin
🔍 Show Answer
✅ B. Pepsin
58. 🍽️ Which digestive gland is both endocrine and exocrine?
- A. Salivary gland
- B. Liver
- C. Pancreas
- D. Stomach
🔍 Show Answer
✅ C. Pancreas
59. 🌬️ What helps alveoli in efficient gas exchange?
- A. Thick walls
- B. Low surface area
- C. Thin walls and rich blood supply
- D. Fat lining
🔍 Show Answer
✅ C. Thin walls and rich blood supply
60. 🧬 What is the function of lymph?
- A. Supply oxygen
- B. Remove carbon dioxide
- C. Transport digested fat
- D. Secrete enzymes
🔍 Show Answer
✅ C. Transport digested fat
61. 💧 Which organ is responsible for reabsorption of water during urine formation?
- A. Ureter
- B. Glomerulus
- C. Collecting duct
- D. Tubule
🔍 Show Answer
✅ D. Tubule
62. 🌱 Which organisms prepare their own food using sunlight?
- A. Heterotrophs
- B. Parasites
- C. Autotrophs
- D. Saprophytes
🔍 Show Answer
✅ C. Autotrophs
63. 🧬 What is the full form of ATP?
- A. Adenosine tri-protein
- B. Adenosine tri-phosphate
- C. Adenosine tetra-phosphate
- D. Adenine triphosphate
🔍 Show Answer
✅ B. Adenosine tri-phosphate
64. 🔁 Which process in plants results in loss of water as vapour?
- A. Photosynthesis
- B. Transpiration
- C. Respiration
- D. Excretion
🔍 Show Answer
✅ B. Transpiration
65. 🧬 What is the function of guard cells?
- A. Transport food
- B. Close and open stomata
- C. Store food
- D. Convert sugar
🔍 Show Answer
✅ B. Close and open stomata
66. 💉 Which organ in humans filters the blood?
- A. Heart
- B. Lungs
- C. Kidney
- D. Liver
🔍 Show Answer
✅ C. Kidney
67. 🌬️ What is the movement of air in and out of lungs called?
- A. Inhalation
- B. Ventilation
- C. Respiration
- D. Gas exchange
🔍 Show Answer
✅ B. Ventilation
68. 🧪 What changes starch into sugar during digestion?
- A. Amylase
- B. Lipase
- C. Pepsin
- D. Trypsin
🔍 Show Answer
✅ A. Amylase
69. 🧫 Which part of nephron is involved in ultrafiltration?
- A. Glomerulus
- B. Tubule
- C. Loop of Henle
- D. Collecting duct
🔍 Show Answer
✅ A. Glomerulus
70. 🧬 Which component of blood helps in clotting?
- A. Red blood cells
- B. White blood cells
- C. Platelets
- D. Plasma
🔍 Show Answer
✅ C. Platelets
71. 🧠 Which hormone regulates water balance in the human body?
- A. Insulin
- B. ADH (vasopressin)
- C. Thyroxine
- D. Adrenaline
🔍 Show Answer
✅ B. ADH (vasopressin)
72. 💨 During exhalation, air moves:
- A. Into the lungs
- B. Out of the lungs
- C. Into alveoli
- D. Into the bronchi
🔍 Show Answer
✅ B. Out of the lungs
73. 🌱 Which tissue transports water in plants?
- A. Phloem
- B. Xylem
- C. Cambium
- D. Cortex
🔍 Show Answer
✅ B. Xylem
74. 🧪 What is the pH of gastric juice in the stomach?
- A. 7
- B. 8
- C. 2
- D. 10
🔍 Show Answer
✅ C. 2
75. 🧬 What is the function of villi in the small intestine?
- A. Help in digestion
- B. Increase surface area for absorption
- C. Secrete digestive enzymes
- D. Transport blood
🔍 Show Answer
✅ B. Increase surface area for absorption
76. 🌬️ What happens to the diaphragm when we inhale?
- A. It relaxes and moves up
- B. It contracts and moves down
- C. It becomes flat and rigid
- D. It breaks
🔍 Show Answer
✅ B. It contracts and moves down
77. 🫁 Exchange of gases in humans takes place in:
- A. Bronchi
- B. Alveoli
- C. Trachea
- D. Bronchioles
🔍 Show Answer
✅ B. Alveoli
78. 💉 Which of the following carries blood from the lungs to the heart?
- A. Pulmonary vein
- B. Pulmonary artery
- C. Aorta
- D. Vena cava
🔍 Show Answer
✅ A. Pulmonary vein
79. 🍴 Amylase enzyme digests:
- A. Proteins
- B. Fats
- C. Carbohydrates
- D. Vitamins
🔍 Show Answer
✅ C. Carbohydrates
80. 🌱 Which gas is released during photosynthesis?
- A. CO2
- B. O2
- C. N2
- D. H2O vapor
🔍 Show Answer
✅ B. O2
81. 🧬 Which part of the brain controls breathing?
- A. Cerebrum
- B. Cerebellum
- C. Medulla oblongata
- D. Hypothalamus
🔍 Show Answer
✅ C. Medulla oblongata
82. 🩸 The red color of blood is due to:
- A. Iron
- B. Haemoglobin
- C. Plasma
- D. Platelets
🔍 Show Answer
✅ B. Haemoglobin
83. 🧬 Lungs are covered by a thin membrane called:
- A. Pleura
- B. Pericardium
- C. Alveoli
- D. Diaphragm
🔍 Show Answer
✅ A. Pleura
84. 🔬 Which of the following is not a digestive enzyme?
- A. Pepsin
- B. Amylase
- C. Lipase
- D. Insulin
🔍 Show Answer
✅ D. Insulin
85. 🧪 Protein digestion starts in:
- A. Mouth
- B. Stomach
- C. Small intestine
- D. Liver
🔍 Show Answer
✅ B. Stomach
86. 🧫 Urea is formed in which organ?
- A. Liver
- B. Kidney
- C. Lung
- D. Heart
🔍 Show Answer
✅ A. Liver
87. 🌱 Which process uses water, carbon dioxide and sunlight to make food?
- A. Respiration
- B. Photosynthesis
- C. Transpiration
- D. Germination
🔍 Show Answer
✅ B. Photosynthesis
88. 💡 Which part of nephron filters blood?
- A. Bowman’s capsule
- B. Loop of Henle
- C. Collecting duct
- D. Ureter
🔍 Show Answer
✅ A. Bowman’s capsule
89. 🌬️ Breathing rate increases during exercise due to:
- A. Increase in oxygen in blood
- B. Increase in carbon dioxide in blood
- C. Decrease in sugar
- D. Decrease in energy
🔍 Show Answer
✅ B. Increase in carbon dioxide in blood
90. 🧪 The waste from digestion is removed through:
- A. Kidney
- B. Liver
- C. Large intestine
- D. Lungs
🔍 Show Answer
✅ C. Large intestine
91. 🩸 Which of the following is NOT a component of blood?
- A. RBCs
- B. WBCs
- C. Nephrons
- D. Plasma
🔍 Show Answer
✅ C. Nephrons
92. 🌬️ During breathing, air is filtered by:
- A. Alveoli
- B. Trachea
- C. Nasal passage
- D. Diaphragm
🔍 Show Answer
✅ C. Nasal passage
93. 🍃 Which mineral is essential for chlorophyll formation?
- A. Calcium
- B. Potassium
- C. Iron
- D. Magnesium
🔍 Show Answer
✅ D. Magnesium
94. 🧬 Which component of blood fights infection?
- A. Platelets
- B. Plasma
- C. WBCs
- D. RBCs
🔍 Show Answer
✅ C. WBCs
95. 🫁 What happens to ribs when we inhale?
- A. Move down and in
- B. Move up and out
- C. Stay fixed
- D. Move backward
🔍 Show Answer
✅ B. Move up and out
96. 🌿 Stomata help in:
- A. Transpiration
- B. Photosynthesis
- C. Exchange of gases
- D. All of these
🔍 Show Answer
✅ D. All of these
97. 🧬 Anaerobic respiration in human muscles produces:
- A. Ethanol
- B. Carbon dioxide
- C. Lactic acid
- D. Glucose
🔍 Show Answer
✅ C. Lactic acid
98. 🧠 Which organ maintains balance and posture?
- A. Cerebrum
- B. Medulla
- C. Cerebellum
- D. Spinal cord
🔍 Show Answer
✅ C. Cerebellum
99. 🫁 Which structure prevents food from entering the windpipe?
- A. Glottis
- B. Epiglottis
- C. Trachea
- D. Pharynx
🔍 Show Answer
✅ B. Epiglottis
100. 💧 Which of the following is a part of excretory system?
- A. Liver
- B. Kidney
- C. Lung
- D. Heart
🔍 Show Answer
✅ B. Kidney
📚 Frequently Asked Questions (FAQs) – Life Processes
🔍 What are life processes in Class 10 Science?
Life processes are biological functions essential for the survival of living organisms. These include nutrition, respiration, transportation, and excretion.
🌿 What is the difference between autotrophic and heterotrophic nutrition?
Autotrophic nutrition is when organisms (like plants) make their own food using sunlight, while heterotrophic organisms (like animals) depend on other organisms for food.
🫁 What is the role of alveoli in respiration?
Alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place during respiration.
💧 How does the excretory system function in humans?
The excretory system removes metabolic waste. Kidneys filter blood to form urine, which is carried by ureters to the bladder and then expelled through the urethra.
🧬 What is the role of ATP in cells?
ATP (Adenosine Triphosphate) is the energy currency of the cell. It stores and supplies the energy needed for various biological processes.
💡 How is oxygen transported in the human body?
Oxygen is transported by red blood cells, which bind to oxygen using the protein hemoglobin and carry it to all body tissues.
🍽️ What enzymes are involved in digestion?
Key digestive enzymes include amylase (carbohydrates), pepsin (proteins), and lipase (fats). These are secreted by salivary glands, stomach, pancreas, and small intestine.
🌬️ What happens during inhalation and exhalation?
During inhalation, the diaphragm contracts, and the chest cavity expands, allowing air in. During exhalation, the diaphragm relaxes and air is pushed out of the lungs.
🩸 What is the function of blood in transportation?
Blood transports oxygen, nutrients, hormones, and waste products throughout the body via the circulatory system.
🧪 How do plants excrete waste?
Plants excrete waste through processes like transpiration, storage of waste in vacuoles, and release of resins and latex.