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Biology Paper 1 Form 4 End of Term 2 Exams 2021

Class: Form 4

Subject: Biology

Level: High School

Exam Category: Form 4 End Term 2 Exams

Document Type: Pdf

Views: 1310 Downloads: 28

Exam Summary

231/1
BIOLOGY
PAPER 1
THEORY
END OF TERM 2 EXAM 2021

1. Name the cell organelles that would be abundant in:
a) White blood cells destroying pathogens 1mk

b) Palisade mesophyll cells 1mk

c) Skeletal muscle cells 1mk

2. The following graph represents a growth pattern observed in a group of animals

a) Name the type of growth shown above (1mk)

b) Name the phylum of animals whose members display the growth pattern named in (a) above (1mk)

c) Identify the process which leads to increase in body size at the part marked S (1mk)

3. (a) When observing a specimen through a light microscope, a student noted that the field of view was dark. Name 2 parts of the microscope that the student should adjust to make the field of view clear (2mks)

b) A specimen was magnified 1000 times by a light microscope whose eye piece lens magnification is x10. Calculate magnification of objective lens (2mks)

4. The flow diagram below represents a process of photosynthesis. Study diagram and answer the questions that follow

(a) Name the substances labeled (3mks)
A ……………………………………………
B ……………………………………………
C ……………………………………………
(b) Write an equation to show the process illustrated above (1mk)

5. Name the parts of the body of a mammal where each of the following types of joints are found (3mks)
(i) Fixed joints

(ii) Gliding joint

(ii) Huge joint

6. The following is a diagrammatic representation of protein synthesis. Study and answer the questions that follow.

(a) Name process R (1mk)

(b) Where in the cell does R take place? (1mk)

(c) Name
(i) Product Q (1mk)

(ii) Part X (1mk)

7. (a) Name an element which is a present in proteins but is not in carbohydrates (1mk)

(b) State three functions of proteins in the human body (3mks)

8. State the functions of the following cell structures during cell division (2mks)
(i) Centriole

(ii) Centromere

9. In a blood test, a few drops of anti- serum were added to two samples of blood. It was observed that agglutination occurred. What were the possible blood groups of the two blood samples (2mks)

10. Name the division of the kingdom Plantae with the following spores producing bodies (2mks)
(i) Sori

(ii) Sporangium

11.

(a) What structure in a mammal is represented by the following? 3mks
(i) The rubber balloon

(ii) The syringe case

(iii) The plunger

b) Describe what happens if the rubber plug is pulled in the direction shown by the arrow (1mk)

12 (a) Define the term alleles (1mk)

(b) Explain why the body temperatures of a healthy human beings must rise up to 39°C on a humid day (2mks)

(c) In an experiment, a piece of brain was removed from a rat. It was found that the rat had large fluctuation of body temperatures. Suggest the part of the brain that had been removed (1mk)

13. Name the causative agent of the following diseases in humans (2mks)
(a) Ameobic dysentry

(b) Candidiasis

14 (a) Define the term immunity (1mk)

(b) Distinguish between natural immunity and acquired immunity (2mks)

(c) Identify one immunizable disease in Kenya (1mk)

15. The chart below shows a feeding relationship in a certain ecosystem

Biology Paper 1 Form 4 End of Term 2 Exams 2021

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