Life Processes Class 10 MCQs Chapter Wise

Life Processes Class 10 MCQs

Life Processes – MCQs with Answers & Explanations

Class: 10 | Subject: Science | Section: Biology
Topic: Life Processes (Chapter Wise)
Based on NCERT Syllabus | CBSE Board Examination Pattern

1. Life processes are essential for:

a) Growth only
b) Survival only
c) Maintenance of living organisms
d) Reproduction only

Answer: c) Maintenance of living organisms
Explanation: Life processes like nutrition, respiration, transport, and excretion maintain and sustain life.

2. Mode of nutrition in plants:

a) Heterotrophic
b) Autotrophic
c) Saprophytic
d) Parasitic

Answer: b) Autotrophic
Explanation: Plants prepare food using sunlight, CO₂, and water via photosynthesis.

3. Photosynthesis occurs in:

a) Mitochondria
b) Chloroplast
c) Ribosome
d) Nucleus

Answer: b) Chloroplast
Explanation: Chloroplast contains chlorophyll which traps solar energy.

4. Opening and closing of stomata is controlled by:

a) Guard cells
b) Epidermis
c) Xylem
d) Phloem

Answer: a) Guard cells
Explanation: Guard cells regulate gas exchange and transpiration.

5. Human digestion begins in:

a) Stomach
b) Mouth
c) Small intestine
d) Liver

Answer: b) Mouth
Explanation: Salivary amylase starts starch digestion.

6. Largest gland in human body:

a) Pancreas
b) Liver
c) Salivary gland
d) Thyroid

Answer: b) Liver
Explanation: Liver produces bile aiding fat digestion.

7. Functional unit of kidney:

a) Neuron
b) Nephron
c) Alveoli
d) Villus

Answer: b) Nephron
Explanation: Nephrons filter blood and form urine.

8. Oxygen is transported by:

a) Plasma
b) Platelets
c) Hemoglobin
d) WBCs

Answer: c) Hemoglobin
Explanation: Hemoglobin in RBCs binds oxygen for transport.

9. Site of gaseous exchange in lungs:

a) Bronchi
b) Trachea
c) Alveoli
d) Diaphragm

Answer: c) Alveoli
Explanation: Thin walls allow diffusion of gases.

10. Energy currency of the cell:

a) DNA
b) ATP
c) RNA
d) ADP

Answer: b) ATP
Explanation: ATP stores and releases energy for cellular work.

11. Anaerobic respiration occurs in:

a) Presence of oxygen
b) Absence of oxygen
c) Sunlight
d) Water

Answer: b) Absence of oxygen
Explanation: Produces less energy and forms lactic acid/alcohol.

12. Transport in plants occurs through:

a) Xylem & Phloem
b) Nephrons
c) Alveoli
d) Neurons

Answer: a) Xylem & Phloem
Explanation: Xylem carries water; phloem transports food.

13. Transpiration helps in:

a) Cooling
b) Ascent of sap
c) Mineral transport
d) All of these

Answer: d) All of these
Explanation: It creates suction pull aiding water movement.

14. Heart is made of:

a) Smooth muscle
b) Cardiac muscle
c) Skeletal muscle
d) Nervous tissue

Answer: b) Cardiac muscle
Explanation: Specialized muscle enables rhythmic contractions.

15. Double circulation occurs in:

a) Fish
b) Humans
c) Frogs
d) Insects

Answer: b) Humans
Explanation: Blood passes heart twice per cycle.

16. Waste removed by kidneys:

a) Urea
b) Oxygen
c) Glucose
d) Starch

Answer: a) Urea
Explanation: Formed during protein metabolism.

17. Dialysis is used when:

a) Heart fails
b) Kidneys fail
c) Lungs fail
d) Liver fails

Answer: b) Kidneys fail
Explanation: Artificial removal of wastes from blood.

18. Food absorption occurs in:

a) Stomach
b) Small intestine
c) Large intestine
d) Esophagus

Answer: b) Small intestine
Explanation: Villi increase surface area for absorption.

19. Pulse is related to:

a) Heartbeat
b) Breathing
c) Digestion
d) Excretion

Answer: a) Heartbeat
Explanation: Pulse reflects arterial expansion during heart contraction.

20. Main excretory product in plants:

a) Urea
b) Resin/Gums
c) Ammonia
d) Sweat

Answer: b) Resin/Gums
Explanation: Plants store wastes in leaves, bark, resins, and gums.

Life Processes Class 10 MCQs Chapter Wise

Life Processes – MCQs with Answers & Explanations

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