Some model questions are given here for self evaluation. These are selected from the lessons such as, Food for the Living World, Beyond The Sense of Taste, Tissue to Tissue, To release Energy, To Maintain Homeostasis. Try to answer the questions by yourselves. Then click on the link, ‘Answers’, provided below to know the answers. Compare and rate your answers.
Questions
Score 40 Time : 1 ½ Hrs
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Questions 1-6. Answer any five only 1 score each. (5×1 =5)
1. Choose the correct pair.
a. Chlorophyll a - Bluish green
b. Carotene - Yellowish green
c. Xanthophyll - Yellowish orange
2. Complete the following statement.
_____ is the double-layered membrane covering the heart.
3. Find the odd one in the group. Write the common features of the others.
Absorption of amino acids, Absorption of glycerol, Absorption of galactose,
Absorption of fructose.
4. Find the missing item in the second pair on the basis of the relationship between the items in the first pair.
Albumin : Regulates blood pressure.
Fibrinogen : ________
5. What are the features of active transport?
6. Choose the correct answer.
Which is the function of leucocytes (WBCs)?
A) Clotting of blood; B) Regulation of blood pressure; C) Transport of respiratory gases; D) Immunity
Questions 7-13: Answer any 6 only. 2 scores each. (6x2=12)
7. Given below is a symptom of a disease affecting the lungs.
..Alveoli rupture due to the loss of elasticity, by the deposition of toxic
substances contained in tobacco.........................................................
b. How does the disease affect the lung?
8. Complete the illustration
9. Named below are two scientists who made discoveries about photosynthesis.
a) Melvin calvin; b) Van Neil
What are their discoveries?
10. From the four statement given below. Identify those that are related to glycolysis.
a) Takes place in mitochondria.
b) Glucose is converted into pyruvic acid.
c) Oxygen is not needed.
d) 28 ATP molecules are produced.
11. Complete the flow chart showing the systemic circulation of blood.
Left ventricle→ (a)→ Arteries →..(b)... → ...(c)... → Venae cavae → ...(d)....
12. Make appropriate pairs using the things named in the box.
Sucrose, Oil seeds, Protein, Fruits, Sugar cane, Fructose, Pulses, Fat...
13. What are the functions of lymphatic system?
14. Observe the figure and answer the questions.
a. Name the gases indicated by A and B.
b. Name the parts indicated by C and D.
c. How does the structure of the part indicated by C help in the exchange of gases? Explain.
15. Explain the role of transpiration in transporting the water absorbed by roots to the leaves.
16. Rearrange the items in columns B and C so that they match with those in column A.
17. One stage in the process of photosynthesis is stated below.
Light is used
a. Name this stage.
b. Where does this stage take place?
c. What are the important reactions at this stage?
18. What are the ways in which carbon dioxide is, removed from the cells?
19. Given below are six statements. Classify them appropriately.
a. Valves are not present.
b. Thin wall.
c. Carries blood from the heart.
d. Transports blood at low speed and low pressure.
e. Carries blood to the heart.
f. Thick wall.
Questions 20-23: Answer any 2 only. 4 scores each. (4x2=8)
20. Complete the table.
21. Copy the given diagram and name and mark the parts described.
a. Living tissue which forms the tooth.
b. Part where blood vessels, lymph ducts and nerve fibres are seen.
c. Hardest part which is dead tissue.
22. Observe the figure and answer the questions.
a. Name the blood vessels indicated by A and B.
b. Name the valves indicated by C and D.
c. What is the function of the blood vessel indicated by A?
d. What is the function of the valve indicated by C?
