Life Processes-Practice Questions | Class-X
The chapter-6 of class-10 science is about the various life processes that is essential for an living organism to function as living. This includes the life processes such as the process of nutrition, respiration including cellular respiration, blood and lymph transportation system, excretion. This post Life Processes – Practice Questions brings a set of questions of 1, 2, 3 and 5 marks from both the life processes of plants and animals.
1 Marks
1. Define enzyme. Name one enzyme in human that digests fats.
2. What is chyme?
3. What do you understand by peristaltic movement?
4. Mention any one point of difference between Pepsin and Trypsin.
5. What is common for cuscuta, ticks and leeches?
6. Give one point which is common for both aerobic and anaerobic respiration.
7. Why are lungs divided into very small sac-like structures called alveoli?
8. Why no CO2 is released by the plants during the day?
9. What are the two changes that take place in the chest region during the process of inhalation?
10. Why is the breathing rate in aquatic organisms higher as compared to the terrestrial organisms?
11. What prevents the air passage in the human body from collapsing?
12. Name the component of blood that helps in the formation of blood clot in the event of a cut.
13. Why do veins have thin walls as compared to arteries?
14. Name any two substances that are selectively re-absorbed as the urine flows along the tube.
15. Name the part of the excretory system in which urine is stored for some time.
16. Define guttation.
17. What is transpiration?
18. What will happen if the phloem of a plant is removed?
2 Marks
1. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
2. Write the two steps involved in the breakdown of glucose in our muscle cells in case of lack of oxygen.
3. What do you think is the role of epiglottis?
4. What is the role of HCl in protein digestion?
5. The small intestine in herbivore is longer than in carnivores.
6. What would be the consequences of complete blockage of bile duct in human?
7. Write any two functions of the large intestine in man.
8. What is saliva? State its role in the digestion of food.
9. What is the significance of emulsification of fats?
10. Why is the inner wall of alimentary canal not digested although the digestive enzyme can digest all the materials that make cells?
11. What is transpiration pull?
12. Explain the mechanism of opening and closing of stomata in plants?
13. What are the adaptations of leaf for photosynthesis?
14. Two green plants are kept separately in oxygen-free containers, one in dark and the other in continuous light. Which one will live longer? Give reasons.
15. Explain the mechanism of gaseous exchange between tissues and blood.
16. If a plant is releasing CO2 and taking in O2 during the day, does it mean that there is no photosynthesis occurring? Justify your answer.
17. What are stomata and lenticels? What is their role in respiration?
18. Why of fish die when taken out of water?
19. Leaves of a healthy potted plant were coated with Vaseline. Will this plant remain healthy for long? Give reasons for your answer.
20. Why white blood corpuscles are called ‘soldiers’ of the body?
21. Which part of the human heart is considered as pace-maker? Why is it so called?
22. Why are the walls of ventricles thicker than the auricles?
23. What are the roles of (i) vena cava; and (ii) Pulmonary vein?
24. With the help of a flow chart explain the process of circulation of blood between human heart and body.
25. In mammals and birds, why is it necessary to separate oxygenated and de-oxygenated blood?
26. What is blood pressure? How it is measured? Give one difference between systolic pressure and diastolic pressure.
27. What is the role of platelets in blood?
28. State the function of Bowmen’s capsule and glomerulus.
3 Marks
1. Define nutrition. Explain any two type of nutrition exhibited by living organisms, along with examples.
2. Explain the ways in which glucose is broken down in absence of oxygen.
3. Explain the process of nutrition in Amoeba with the help of a diagram.
4. Name and components of gastric juice and mention their roles.
5. What is the role of the pancreas in the digestion of food in humans?
6. What are the adaptions of leaf for photosynthesis?
7. State the roles of the following in humans: (i)Pancreatic juice; (ii) Gastric juice; (iii) Bile juice
8. Explain the mechanism of photosynthesis.
9. What is the significance of transpiration in plants?
10. Why do plants have lower energy need as compared to animals?
11. Differentiate between breathing and respiration.
12. Mention any three significance of transpiration in plants.
13. State three features of respiratory organs of animals.
14. List three differences between arteries and veins.
15. What is lymph? Mention any two roles performed by them in the human body.
16. Describe double circulation in human beings. Why is it necessary?
17. Differentiate between transportation of food and transportation of water in plants.
18. Explain the mechanism of breathing in human.
19. Name the energy currency in the living organisms. When and where is it produced?
20. Explain any three methods used by plants to get rid of the excretory products produced by them.
5 Marks
1. Differentiate between autotrophic and heterotrophic nutrition?
2. How do carbohydrates, proteins, and fats get digested in human beings?
3. Explain the process of nutrition in Amoeba.
4. Describe the process of aerobic respiration.
5. Give a flow chart of the blood flow in human beings.
6. Mention any five points of difference between blood and lymph.
7. Along with the help of a diagram describe the structure of the kidney.
8. Explain the mechanism of uptake of water by xylem in plants.
9. Answer the following:
10. Draw the structure of a nephron and label the following on it: Glomerulus, Bowman’s capsule, Renal artery, Collecting duct.
11. What happens to glucose that enters the nephron along with filtrate?
12. Explain the process of urine formation in kidneys.
