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Form 3 Biology Paper 2 End of Term 3 Examination 2022

Class: Form 3

Subject: Biology

Level: High School

Exam Category: Form 3 End Term 3 Exams

Document Type: Pdf

Views: 862 Downloads: 51

Exam Summary

Term 3 - 2022 BIOLOGY (QUESTION PAPER) FORM THREE (3)
Time: 2 Hours PAPER 2 Name: …………………………………………………………. AdmNo: ……………….
School: ……………………………………………………….. Class: ………………….. Signature: ……………………………………………………..
Date: …………………...
INSTRUCTIONS TO CANDIDATES
 Write your name and adm.number in the spaces provided above
 Sign and write the date of examination in the spaces provided.
 This paper consists of sections A and B answer all questions in section A
 In section B answer question 6compulsory and either question 7or 8 in spaces provided after question 8
 Answer all the questions in the spaces provided.

1. The figure below represents a set up that was used to investigate a certain process in a plant.

a.) State the aim of the experiment. (1mk)
……………………………………………………………………………………………………………………………………………………………………………………………………………………
b.) Why was sodium hydrogen carbonate added to water in this experiment? (1mk)
……………………………………………………………………………………………………………………………………………………………………………………………………………….......
c.) Explain why the number of bubbles reduced by evening. (2mks) ………………………………………………………………………........................................................... ………………………………………………………………………………………………………………
d.) Explain the use of the following in this experiment
i.) Water plant (2mks)
……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………
ii.) Wooden block (1mk)
……………………………………………………………………………………………………………………………………………………………………………………….
c.) Write a word equation to represent the chemical process being investigated. (1mk)
…………………………………………………………………………………………………. ………………………………………………………………………………………………….
2. The figure below represents a diagram of a potometer

(a) What is the potometer used for ? (1mk)
……………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………
(b) State the precautions which should be taken when setting up a potometer (3mks) ……………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………
(c) Explain what you will expect if set up was placed under the following environmental conditions;
(i) Dark room(2mks) …………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………………………
(ii) Leafy shoot enclosed in polythene bag (1mk) …………………………………………………………………………………………………………………………………………………………. ………………………………………………………………………………………………………………………………………………………….
(iii) In a current of air created by a fan (1mk) …………………………………………………………………………………………………………………………………………………………. ………………………………………………………………………………………………………………………………………………………….
3. In an experiment to investigate on aspect of digestion, two test tubes A and B were set-up as
shown in the diagram below;

The test tubes were left in the bath for 30minutes.The content of each test tube was then tested for starch using iodine solution:-
(a) What was the aim of the experiment? (1mk) …………………………………………………………………………………………………… …………………………………………………………………………………………………..
(b) What results were expected in test-tube A and B (2mks) A……………………………………………………………………………………………… ………………………………………………………………………………………………. B……………………………………………………………………………………………….. ………………………………………………………………………………………………..
(c) Account of the results you have given in (b) above in test tube A and B
Test tube A…………………………………………………………………………………………… ……………………………………………………………………………………………. ……………………………………………………………………………………………. ……………………………………………………………………………………((2mks)
Test tube B ……………………………………………………………………………………….. ………………………………………………………………………………………… ………………………………………………………………………………………… …………………………………………………………………………………(2mks)
(d) Describe the procedure of testing for starch (1mk) ………………………………………………………………………………………………………... ………………………………………………………………………………………………………
4. The diagram below represents a part of thoracic region of a human being;

(a) Name the structures labeled K and L (2mks) K……………………………………………… L……………………………………………….
(b) How does structure R bring about inhalation (4mks) ……………………………………………………………………………………………………... ……………………………………………………………………………………………………... ……………………………………………………………………………………………………... ……………………………………………………………………………………………………...
(c) Give the scientific name of the organism that causes whooping cough (1mk) ……………………………………………………………………………………………………...
(d) Name the main site of gaseous exchange in human being. (1mk) ……………………………………………………………………………………………………...
5. The diagram below shows the vertical section of a female reproductive system

Form 3 Biology Paper 2 End of Term 3 Examination 2022

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