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Form 2 Biology End of Term 2 Examination 2022

Class: Form 2

Subject: Biology

Level: High School

Exam Category: Form 2 End Term 2 Exams

Document Type: Pdf

    

Views: 927     Downloads: 18

Exam Summary

1. Define the following terms as used in biological studies
a) Species
………………………………………………………………………………………………………………………………………………………………………………(1mk
b) Diastema
………………………………………………………………………………………………………………………………………………………………………………(1mk
2. a) Identify the function of a microscope shown by the arrow in the diagram below
1.png
Identity ………………………………………………………………………………(1mk
b) Give the importance of the concept identified in a) in microscope work ………………………………………………………………………………………………………………………………………………………………………………………...(1mk
c) State the formula for calculation of magnification when using a light microscope ………………………………………………………………………………………………………………………………………………………………………………………...(1mk
3. a) Why do carnivores have a shorter alimentary canal compared to herbivores?
………………………………………………………………………………………………………………………………………………………………………………………...(1mk
b) Give TWO reasons why digestion of starch stops in the stomach of animals ………………………………………………………………………………………………………………………………………………………………………………………............ ………………………………………………………………………………………………………………………………………………………………………………………..(2mks
4. a) State the function of the following (2mks
i) Epiglottis ……………………………………………………………………………………………..
ii) Pericardial membrane ………………………………………………………………………………………………
b) Fill the table below to show the differences between smooth endoplasmic reticulum and rough endoplasmic reticulum
2.png
5. State the importance of the following in photosynthesis (2mks
a) Xylem tissue
……………………………………………………………………………………………………………………………………………………………………………………
b) Leaves having very thin leaf lamina
……………………………………………………………………………………………………………………………………………………………………………………
6. The following are apparatus used in biological studies
3.png
State the importance of the labelled parts to the function of the apparatus shown: (2mks
i) Part W……………………………………………………………………………………
ii) Part Z ……………………………………………………………………………………
7. The diagram below is a sketch of biological process
4.png
a) Identify compounds labeled (2mks
C ……………………………………………………………………………………….. D ………………………………………………………………………………………..
b) State TWO conditions that can denature enzyme K (2mks
………………………………………………………………………………………….………………………………………………………………………………………….….............................................
8. Explain why the following happen in a human body during mountain climbing
a) The number of red blood cells increase (2mks
………………………………………………………………………………………….………………………………………………………………………………………….….....................................................................................................................................
b) The blood vessels within the nose may burst leading to nose bleeding (1mk
………………………………………………………………………………………….………………………………………………………………………………………….
9. a) Under what condition is fat used as a source of energy in a human body
………………………………………………………………………………………………………………………………………………………………………………………...(1mk
b) State TWO reasons to explain why children require more energy-rich food than adults ………………………………………………………………………………………………………………………………………………………………………………………............ ………………………………………………………………………………………………………………………………………………………………………………………..(2mks
10. a) While using a light microscope, Susan observed 10 cells along the diameter of a field of view with a radius of 3mm. Calculate the estimated diameter of one cell
………………………………………………………………………………………………………………………………………………………………………………………............ ………………………………………………………………………………………………………………………………………………………………………………………..(2mks
b) Give TWO advantages of using an electron microscope in biological studies ………………………………………………………………………………………………………………………………………………………………………………………............
11. Study the photomicrograph shown below to answer the questions that follow
5.png
a) Give TWO reasons why the illustration above is a plant cell
………………………………………………………………………………………………………………………………………………………………………………………...........................................................................................................................(2mks
b) Explain how part Q is important to the function of a root hair cell
……………………………………………………………………………………………………………………………………………………………………………....(2mks
12. a) State TWO adaptive features that increase surface area in the ileum (2mks
……………………………………………………………………………………………………………………………………………………………………………............................
b) Give TWO functions of the operculum in a fish ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..(2mks
13. James wrote the scientific name of an organism as VIBRO cholerae
a) Write the scientific name above correctly using the rules of binomial nomenclature
…………………………………………………………………………………….(1mk
b) What is the advantage of referring to organisms by their scientific names
……………………………………………………………………………………………………………………………………………………………………………….(1mk
14. State TWO ways osmosis is important to the body of a dog (2mks
………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………
15. The following diagram is a cross-section of blood vessels
6.png
a) Identify the blood vessel labelled (2mks
i) R ………………………………………………………………………………..
ii) S ………………………………………………………………………………..
b) Which letter represents the blood vessel that: (2mks
i) Carries blood of high pressure …………………………………………………
ii) Has valves along its length …………………………………………………….
16. The diagram shown below represents cross section of stems of different plants
7.png
a) Which letter represents the stem of a monocot plant (1mk ………………………………………………………………………………………………
b) Give a reason for your answer in a) above (1mk ………………………………………………………………………………………………
c) State TWO ways in which Q will differ with a section of the root of the same plant
17. The set up shown below can be used to demonstrate a given physiological process
8.png
a) State the expected result on the level of sucrose solution in the straw (1mk
………………………………………………………………………………………….
b) Account for your answer in a) above (2mks
………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………
18. a) Explain why
i) it is important to screen blood before transfusion (1mk ………………………………………………………………………………………………………………………………………………………………………………………………
ii) A person of blood group Bcan not receive blood from a blood group A donor (2mks ………………………………………………………………………………………………………………………………………………………………………………………………
19. The diagram below is a skull of an animal
9.png
a) Identify the mode of feeding of the animal represented above (1mk
…………………………………………………………………………………………..
b) Give a reason for your answer in a) above (1mk
………………………………………………………………………………………..……………………………………………………………………………………………..
c) Label the following parts in the diagram above (2mks
i) incisor ii) carnassial tooth
20. a) Distinguish between pulmonary circulation and systemic circulation (2mks
………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………
b) What is the importance of interventricular septum to the functioning of the heart (1mk ………………………………………………………………………………………………………………………………………………………………………………………………
21. Study the set up shown below and answer the questions that follow
10.png
a) Account for the observation made on the rate of movement of the air bubble when the setup is transferred to a windy area (2mks
……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….
b) Why is it advisable to cut the leafy shoot under water (1mk
………………………………………………………………………………………….
22. Protein digesting enzymes like trypsin and pepsin are released in their inactive forms in the alimentary canal
a) What is the biological significance of this? (1mk
……………………………………………………………………………………………………………………………………………………………………………………
b) Name the compounds that convert these compounds to their active forms (2mks
i) Trypsinogen …………………………………………………………………………
ii) Pepsinogen ………………………………………………………………………….
23. Give TWO adaptations of the alveolus to its function (2mks
………………………………………………………………………………………………………………………………………………………………………………………………
24. Study the experimental setup shown below
11.png
a) What was the aim of the experiment? (1mk
…………………………………………………………………………………………………………………………………………………………………………………….
b) Account for the expected observation in test tube B (2mks
…………………………………………………………………………………………………………………………………………………………………………………….
25. Study the graph shown below
12.png
a) Account for the rate of enzymatic reaction in the A-B direction (2mks
……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….
b) Give TWO limiting factors at B-C (2mks
……………………………………………………………………………………………………………………………………………………………………………………
26. Consider the experimental set up shown below
13.png
Account for the results obtained in test tube B in case boiled yeast was used (2mks ………………………………………………………………………………………… ………………………………………………………………………………………… …………………………………………………………………………………………

 

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