MCQ on Life Processes CBSE Class 10
1. Which process is essential for all living organisms to get energy?
A) Reproduction
B) Respiration
C) Excretion
D) Transportation
Answer: Respiration
2. Which organ is mainly responsible for respiration in humans?
A) Heart
B) Lungs
C) Kidney
D) Stomach
Answer: Lungs
3. Which gas is taken in during breathing?
A) Carbon dioxide
B) Oxygen
C) Nitrogen
D) Hydrogen
Answer: Oxygen
4. Which gas is released during respiration?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen
Answer: Carbon dioxide
5. Which organ pumps blood in the human body?
A) Lungs
B) Brain
C) Heart
D) Liver
Answer: Heart
6. Which blood cells carry oxygen?
A) White blood cells
B) Red blood cells
C) Platelets
D) Plasma
Answer: Red blood cells
7. Which pigment in blood carries oxygen?
A) Chlorophyll
B) Haemoglobin
C) Myoglobin
D) Melanin
Answer: Haemoglobin
8. Which part of the heart separates oxygenated and deoxygenated blood?
A) Valves
B) Septum
C) Arteries
D) Veins
Answer: Septum
9. Which vessels carry blood away from the heart?
A) Veins
B) Capillaries
C) Arteries
D) Lymph
Answer: Arteries
10. Which vessels carry blood toward the heart?
A) Arteries
B) Capillaries
C) Veins
D) Lymph vessels
Answer: Veins
MCQ on Life Processes CBSE Class 10
11. Which organ filters blood in the human body?
A) Heart
B) Lungs
C) Kidneys
D) Liver
Answer: Kidneys
12. The functional unit of kidney is
A) Alveolus
B) Nephron
C) Neuron
D) Atrium
Answer: Nephron
13. Which waste is removed from blood by kidneys?
A) Carbon dioxide
B) Urea
C) Oxygen
D) Glucose
Answer: Urea
14. Which organ helps in digestion of food?
A) Lungs
B) Stomach
C) Heart
D) Kidney
Answer: Stomach
15. Which enzyme is present in saliva?
A) Pepsin
B) Trypsin
C) Amylase
D) Lipase
Answer: Amylase
16. Where does digestion of proteins start?
A) Mouth
B) Stomach
C) Small intestine
D) Large intestine
Answer: Stomach
17. Which juice helps in digestion of fats?
A) Saliva
B) Bile
C) Gastric juice
D) Pancreatic juice
Answer: Bile
18. Where is bile produced?
A) Gall bladder
B) Pancreas
C) Liver
D) Small intestine
Answer: Liver
19. Where is bile stored?
A) Liver
B) Pancreas
C) Gall bladder
D) Stomach
Answer: Gall bladder
20. Which part of digestive system absorbs digested food?
A) Stomach
B) Small intestine
C) Large intestine
D) Oesophagus
Answer: Small intestine
MCQ on Life Processes CBSE Class 10
21. Which structures in small intestine increase surface area?
A) Nephrons
B) Alveoli
C) Villi
D) Bronchi
Answer: Villi
22. Which process is used by plants to make food?
A) Respiration
B) Transpiration
C) Photosynthesis
D) Excretion
Answer: Photosynthesis
23. Which gas is required for photosynthesis?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen
Answer: Carbon dioxide
24. Which pigment is required for photosynthesis?
A) Haemoglobin
B) Chlorophyll
C) Carotene
D) Melanin
Answer: Chlorophyll
25. Which part of the plant prepares food?
A) Root
B) Stem
C) Leaf
D) Flower
Answer: Leaf
26. Which vessels carry water in plants?
A) Phloem
B) Xylem
C) Cambium
D) Cortex
Answer: Xylem
27. Which vessels carry food in plants?
A) Xylem
B) Phloem
C) Cortex
D) Pith
Answer: Phloem
28. Loss of water from plant leaves is called
A) Respiration
B) Transpiration
C) Photosynthesis
D) Diffusion
Answer: Transpiration
29. Which pores are present on leaves?
A) Lenticels
B) Stomata
C) Nephrons
D) Alveoli
Answer: Stomata
30. Which process removes waste from the body?
A) Respiration
B) Excretion
C) Digestion
D) Circulation
Answer: Excretion
MCQ on Life Processes CBSE Class 10
31. Which gas is released by plants during photosynthesis?
A) Carbon dioxide
B) Oxygen
C) Nitrogen
D) Hydrogen
Answer: Oxygen
32. Which blood group is called universal donor?
A) A
B) B
C) AB
D) O
Answer: O
33. Which blood group is called universal recipient?
A) O
B) A
C) B
D) AB
Answer: AB
34. Which part of the brain controls breathing?
A) Cerebrum
B) Cerebellum
C) Medulla
D) Hypothalamus
Answer: Medulla
35. Which chamber of the heart pumps oxygenated blood to the body?
A) Right atrium
B) Left atrium
C) Right ventricle
D) Left ventricle
Answer: Left ventricle
36. Which chamber receives oxygenated blood from lungs?
A) Right atrium
B) Left atrium
C) Right ventricle
D) Left ventricle
Answer: Left atrium
37. Which part of plant absorbs water from soil?
A) Stem
B) Leaves
C) Roots
D) Flowers
Answer: Roots
38. Which substance provides energy to cells?
A) Oxygen
B) Carbon dioxide
C) Glucose
D) Urea
Answer: Glucose
39. Which waste is removed through lungs?
A) Urea
B) Carbon dioxide
C) Urine
D) Sweat
Answer: Carbon dioxide
40. Which waste is removed through skin?
A) Urea
B) Sweat
C) Carbon dioxide
D) Oxygen
Answer: Sweat
MCQ on Life Processes CBSE Class 10
41. Which organ controls all activities of the body?
A) Heart
B) Brain
C) Kidney
D) Lungs
Answer: Brain
42. Which fluid helps in transport of substances in plants?
A) Blood
B) Lymph
C) Sap
D) Plasma
Answer: Sap
43. Which part of plant transports prepared food?
A) Xylem
B) Phloem
C) Cortex
D) Root hair
Answer: Phloem
44. Which part of human digestive system produces acid?
A) Mouth
B) Stomach
C) Small intestine
D) Liver
Answer: Stomach
45. Which substance is produced during respiration?
A) Glucose
B) Carbon dioxide
C) Oxygen
D) Nitrogen
Answer: Carbon dioxide
46. Which structure helps in gaseous exchange in lungs?
A) Bronchi
B) Alveoli
C) Trachea
D) Diaphragm
Answer: Alveoli
47. Which blood vessels connect arteries and veins?
A) Veins
B) Arteries
C) Capillaries
D) Lymph vessels
Answer: Capillaries
48. Which organ produces insulin?
A) Liver
B) Pancreas
C) Kidney
D) Stomach
Answer: Pancreas
49. Which type of respiration occurs in absence of oxygen?
A) Aerobic respiration
B) Anaerobic respiration
C) External respiration
D) Internal respiration
Answer: Anaerobic respiration
50. Which organism shows autotrophic nutrition?
A) Human
B) Cow
C) Green plant
D) Dog
Answer: Green plant
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