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Class X : Biology

Chapter: Life Processes

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Practice Exercises ( Standard )

Q1. Which type of chemical reactions are most common in human body to release energy?

Solution a

(Marks 1)

Q2. Which part in plant cell generally stores the waste products?

Solution a

(Marks 1)

Q3. What is the role of large intestine in the digestive system of human beings?

Solution a

(Marks 1)

Q4. What causes pain in our muscles after vigorous exercise?

Solution a

(Marks 1)

Q5. What is the liquid matrix of blood known as? List its any two functions?

Solution a

(Marks 2)

Q6. (a) Which force is responsible for upward movement of water during day and night time?
(b) Name the two substances which are translocated in plants.

Solution a

(Marks 2)

Q7. List two functions of the kidney in human beings.

Solution a

(Marks 2)

Q8. How does blood prevents its self loss?

Solution a

(Marks 2)

Q9. Briefly describe the various steps of nutrition in Amoeba.

Solution a

(Marks 2)

Q10. What is the role of stomata in the process of photosynthesis?

Solution a

(Marks 2)

Q11. Leaves of a healthy potted plant were coated with thick layer of wax. Will this plant remain healthy for long? State three reasons for your answer.

Solution a

(Marks 2)

Q12. (a) Name any two waste products excreted by plants.
(b) Explain any two ways through which plants get rid of waste products.

Solution a

(Marks 3)

Q13. (a) Why energy is required by the body?
(b) What is the requirement of nitrogen in the plant body? Mention the form in which it is absorbed by plants?
(c) How does yeast derive its nutrition?

Solution a

(Marks 3)

Q14. List three characteristic features of the organ for exchange of gases in animals?

Solution a

(Marks 3)

Q15. Explain the mechanism of transport of water from soil to the leaves in the plants? Which plant tissue is responsible for movement of water and minerals in plants?

Solution a

(Marks 3)

Q16. (a) Differentiate between arteries and veins on the basis of their function.
(b) Why the walls of arteries are thicker than the that of veins?
(c) Why do veins have valves in them?

Solution a

(Marks 3)

Q17. Write the three main events occuring in the process of photosynthesis.

Solution a

(Marks 3)

Q18. (a) Differentiate between aerobic and anaerobic respiration.
(b) What prevents the air passage from collapsing?

Solution a

(Marks 3)

Q19. Name the glands associated with digestive system and list their functions.

Solution a

(Marks 3)

Q20. Describe the events taking place in heart during heart beat.

Solution a

(Marks 3)

Q21. (a) What are the raw material used in the process of photosynthesis? How are they obtained by the plant?
(b) What causes guard cells to open and close the stomatal pore?
(c) Give one differentiate between autotrophic and heterotrophic modes of nutrition.

Solution a

(Marks 5)

Q22. (a) Why the length of small intestine varies in different animals?
(b) How does food moves in the human alimentary canal? What is the importance of regulated food movement?
(c) Name one enzyme secreted in the human alimentary canal that requires alkaline medium for its action.

Solution a

(Marks 5)

Q23. (a) What is the function of valves present between the upper and lower chambers of human heart?
(b) What is the need of division of heart into four chambers in human beings?
(b) Distinguish between single circulation and double circulation giving appropriate examples.

Solution a

(Marks 5)

Q24. How will you prove experimentally that light is necessary for photosynthesis?

Solution a

(Marks 5)

Q25. (a) Name the parts associated with human excretory system and explain their role.
(b) How is urine removal out of the body controlled?

Solution a

(Marks 5)