It would be useful for students to go through the entire chapter on Life Processes in Class 10 Science because it covers essential biological functions sustaining life. Nutrition and respiration besides excretion and transportation are some of the indispensable processes by which each and every living organism maintains homeostasis and survives. The key to appreciating how cellular level processes ensure complexity of life involves knowing how the body produces energy, how food is digested and how waste is removed from the body.
We present here 25 MCQs planned towards the objective of helping the student of class 10 evaluate his or her knowledge and strengthen understanding of life processes. It includes all critical aspects of the chapter that involve human and plant nutrition, cellular respiration, circulatory processes, and excretion. Whether exams are in store or just reinforcement, these MCQs will prove very instrumental in mastering the topic and achieving academic success.
1. The process of breaking down food into simpler substances is called:
- a) Respiration
- b) Digestion
- c) Excretion
- d) Circulation
Answer: b) Digestion
2. Which of the following is the primary organ for gas exchange in humans?
- a) Lungs
- b) Heart
- c) Stomach
- d) Kidneys
Answer: a) Lungs
3. The main function of the stomata in plants is:
- a) Absorption of water
- b) Photosynthesis
- c) Exchange of gases
- d) Transport of food
Answer: c) Exchange of gases
4. The energy required for life processes is obtained from:
- a) Water
- b) Carbohydrates
- c) Proteins
- d) Vitamins
Answer: b) Carbohydrates
5. Which of the following is a characteristic of aerobic respiration?
- a) Oxygen is not required
- b) It occurs in the cytoplasm
- c) Carbon dioxide is released
- d) It produces less energy
Answer: c) Carbon dioxide is released
6. In humans, the process of digestion starts in:
- a) Mouth
- b) Stomach
- c) Small intestine
- d) Large intestine
Answer: a) Mouth
7. Which enzyme helps in the digestion of starch in the mouth?
- a) Pepsin
- b) Amylase
- c) Lipase
- d) Protease
Answer: b) Amylase
8. In plants, the process of photosynthesis primarily takes place in:
- a) Roots
- b) Flowers
- c) Leaves
- d) Stems
Answer: c) Leaves
9. The transportation of water in plants takes place through:
- a) Phloem
- b) Xylem
- c) Stomata
- d) Roots
Answer: b) Xylem
10. Which of the following is the main component of blood responsible for clotting?
- a) Red blood cells
- b) White blood cells
- c) Platelets
- d) Plasma
Answer: c) Platelets
11. The process by which plants lose water through their leaves is called:
- a) Transpiration
- b) Absorption
- c) Respiration
- d) Translocation
Answer: a) Transpiration
12. In humans, the absorption of nutrients mainly takes place in the:
- a) Stomach
- b) Large intestine
- c) Small intestine
- d) Liver
Answer: c) Small intestine
13. Which of the following is the site of cellular respiration in the cell?
- a) Nucleus
- b) Cytoplasm
- c) Mitochondria
- d) Ribosomes
Answer: c) Mitochondria
14. Which of the following processes is involved in the excretion of waste in plants?
- a) Evaporation
- b) Transpiration
- c) Secretion of resin
- d) Absorption of minerals
Answer: b) Transpiration
15. Which of the following organs is NOT involved in the excretion of waste in humans?
- a) Kidneys
- b) Lungs
- c) Liver
- d) Large intestine
Answer: d) Large intestine
16. The movement of food through the alimentary canal is regulated by:
- a) Enzymes
- b) Peristalsis
- c) Saliva
- d) Gastric juices
Answer: b) Peristalsis
17. The process of absorption of water in plants mainly occurs through:
- a) Stomata
- b) Leaves
- c) Roots
- d) Xylem
Answer: c) Roots
18. Which part of the plant is responsible for the synthesis of food?
- a) Roots
- b) Flowers
- c) Leaves
- d) Stems
Answer: c) Leaves
19. The breakdown of glucose to release energy is known as:
- a) Photosynthesis
- b) Digestion
- c) Respiration
- d) Fermentation
Answer: c) Respiration
20. In humans, urea is removed from the blood by which organ?
- a) Lungs
- b) Kidneys
- c) Liver
- d) Skin
Answer: b) Kidneys
21. Which of the following is responsible for the transport of food in plants?
- a) Xylem
- b) Phloem
- c) Roots
- d) Leaves
Answer: b) Phloem
22. The part of the blood that carries oxygen is:
- a) Red blood cells
- b) White blood cells
- c) Platelets
- d) Plasma
Answer: a) Red blood cells
23. The digestion of proteins begins in the:
- a) Mouth
- b) Stomach
- c) Small intestine
- d) Large intestine
Answer: b) Stomach
24. Which of the following is NOT a life process?
- a) Reproduction
- b) Respiration
- c) Excretion
- d) Communication
Answer: d) Communication
25. The process by which plants take in carbon dioxide and release oxygen is called:
- a) Respiration
- b) Photosynthesis
- c) Transpiration
- d) Digestion
Answer: b) Photosynthesis
The term life processes refers to the functions that organisms perform in order to sustain their life. These are nutrition, respiration, transportation, excretion, and reproduction. All these are indispensable for the survival and growth of living organisms. For example, one of the life processes such as respiration provides energy, while excretion removes waste material from the body. In plants and animals, life processes strictly regulate the body to keep it in a state of homeostasis. It is of this rudimentary level of knowledge in life processes that will provide the foundation upon which to understand biology, as they describe how living organisms relate to their environment and, therefore, how they maintain or sustain their internal balance.
Mastering the life processes chapter is crucial for building a strong foundation in biology. These 25 MCQs cover the fundamental aspects of nutrition, respiration, excretion, and circulation in both plants and animals. Regular practice of such questions will not only help you reinforce your concepts but also prepare you for exams with confidence. Keep revising, and best of luck with your studies!
These were the mcqs on life processes of class 10. These are majorly helpful for the examination point of view, these have high chances of of coming in exams. Do share with you friends these mcqs on life processes and comment below if you have any query regarding life processes mcqs or need any more details or doubt, Do let us know in comment section below.
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