Mid Year Examination 2010

8/2/2019 Mid Year Examination 2010

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MID YEAR EXAMINATION 2010

FORM FOUR BIOLOGY

Paper 1 Time : 1 hour 15 minute

Instruction: For Question 1 to 50, each question is followed by four options A,B,C and D.Choose one correct answer for each question and blacken the corresponding space in your

objective answer sheet.

Section A

1. Which of the following is not field in Biology?

A. Cytology

B. Neurology

C. Virology

D. Psychology

2. Which of the following occupations has no direct relation with Biology?A. A pharmacist

B. A counselor of a food processing factory

C. A structural developer

D. A technologically inclined farmer

3. Studying Biology is important because

I. It enables us to better understand ourselves

II. It enhances our communication skills

III. It creates awareness on the importance of the balance of nature

IV. We can find the cure to certain diseases

A. I, II and III only

B. II, III and IV only

C. I, III and IV only

D. II and I only

4. When making observations, one should

I. Be objective

II. Think rationally

III. Be systematic

IV. Observe carefully

A. I and II onlyB. II and III only

C. II,III and IV only

D. I,II,III and IV

5. A student would like to investigate the rate of evaporation of water in relation to the

presence of wind. Which of the following variables should not be fixed?

A. Size of the container

B. Air flow in the surrounding

C. The amount of water in the container

D. The temperature of the surrounding

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6. The following attitudes are required to conduct scientific investigation except

A. Being honest and accurate

B. Being reckless and untidy

C. Having an open mind

D. Having interest

7. The following information is the description for a biology field.

Which of the following field is related to the description?

A. Embryology C. Biotechnology

B. Anatomy D. Ecology

8. Which of these statements are true about data collected from experiments?

I. To be analysed

II. To be interpreted

III. To make a hypothesis

IV. To determine variables

A. I and II only

B. I and III only

C. II and IV only

D. III and IV only

9. What is the purpose of forming hypothesis in Biology?

A. To determine the final conclusion of the result obtained

B. To suggest probabilities for a problematic observation

C. To establish a conclusion to the problem faced

D. To help identify a general problem

10. Which of the following topics is not involved in the study of Biology?

A. Classification of elements

B. Human reproduction

C. Growth of organisms

D. Animal behaviour

11. Figure 1 shows a typical plant cell.

Figure 1

Which structures labeled P,Q,R and S are found in a plant cell but not in an animal cell?

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The study about the application of

biological processes to produce materials

of use in medicine and industry.


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A. P and Q only

B. P and S only

C. Q and S only

D. P,Q and R only

12. The organelle responsible for the packaging of cellular secretions for export from the cellis called the

A. Golgi apparatus

B. Ribosome

C. Mitochondrion

D. Endoplasmic reticulum

13. Figure 2 shows a cross section of a plant cell.

Figure 2

Which labelled structure, A,B,C orD , is responsible for generating energy for the cell?

14. What are the characteristics of a human cheek cell?

I. It does not have a cell wall

II. It does not have a fixed shape

III. It contains glycogen granules

IV. It does not have a large central vacuole

A. I,II and III only

B. I,III and IV only

C. II,III and IV only

D. I,II,III and IV

15. Cells that have a high density of mitochondria are the

I. OvaII. Sperm cells

III. Flight muscles of a bird

IV. Meristematic cells

A. I and II only

B. II and III only

C. III and IV only

D. II,III and IV only

16. Which substance acts as a medium for chemical reactions in the cell?

A. Water C. GlycerolB. Protein D. Amino acid

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17.

The above statement describes ..

A. Adaptation

B. Specialisation

C. Transformation

D. Organ formation

18. Figure 3 shows two types of cells,PandR, and one type of tissue, Q found in the human

body.

Figure 3

Which of the following systems have cellsP,R and tissue Q?

CellP Tissue Q CellR

A Nervous system Respiratory system Support system

B Blood circulatory system Respiratory system Nervous system

C Respiratory system Nervous system Excretory system

D Blood circulatory system Support system Nervous system

19. Figure 4 shows the human epithelial tissue.

Figure 4

This epithelial cell is most likely to be found in the

A. Trachea

B. Kidney

C. Skin

D. Small intestine

20. Which of the following tissue is strengthened by lignin?

A. Collenchyma C. SclerenchymaB. Parenchyma D. Epidermis

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The cells in a tissue grow,

change shape and adapt to allow

the cells to run certain fuctions

efficiently.


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21. Which of the following tissues produces secretions in the body?

A. Epithelial tissue C. Nerve tissue

B. Muscle tissue D. Connective tissue

22. The main organs found in the skeletal system are the

I. BonesII. Muscles

III. Cartilage

IV. Ligaments

A. I and Ii only

B. I,II and III only

C. I,III and IV only

D. II,III and Iv only

Questions 23 and 24 are based on Figure 5 below.

Figure 5

23. What is the function of P?

A. As a vesicle to store food

B. As a site for cellular respirationC. As a site for protein synthesis

D. As a centre to store genetic materials

24. What is the function of Q?

A. Facilitates movement of synthesized materials within the cell

B. As a control centre for cellular activities

C. As a site for protein synthesis

D. As a collection and distribution centre of synthesised cell materials in the

form of granular secretions

25. The drop in body temperature can result in death if uncontrolled. Its correctivemechanisms are

I. Blood flows away from skin surface

II. Sweat glands reduce secretion

III. Metabolic rate slows down

IV. The hair on the skin erects

A. I,II and III only

B. I,II and IV only



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26. Which of the following statement is true about diffusion?

A. Diffusion is the random movement of molecules which requires metabolic energy

B. Osmosis is an example of simple diffusion

C. Simple diffusion can only occurs through semi permeable membrane

D. Diffusion involves the movement of ions against the concentration gradient

27. Which molecule requires the help of carrier protein to be transported across the plasma

membrane?

A. Glycerol

B. Water

C. Fatty acids

D. Glucose

28. Which of the following processes occurs through osmosis?

A. Uptake of oxygen byAmoeba sp.

B. Transport of water in the cortex of plant stems

C. Accumulation of iodine by aquatic algaeD. Absorption of digested food in the intestine

29. Figure 6 shows two types of sucrose solutions with different concentrations separated by a

semi-permeable membrane.

Figure 6

Which of the following does not occur after equilibrium is achieved?

A. The rate of movement of the water molecules into X and Y is the same

B. The level of solution in X is higher then the level of solution in Y.

C. The osmotic concentration of the sucrose solution in X and Y are the same.

D. The solute molecules move from X to Y.

30. A student soaked a duck egg in a saturated salt solution. After a few days, he found out that

the egg tasted salty. Which of the following statements explain this phenomenon?

I. Saturated salt solution is hypertonic to the egg

II. The egg shell and membrane are permeable to salt

III. Water moves out the egg by osmosis

IV. Salt particles diffuse into the egg

A. I and IV only C. I,II and IV only

B. II and III only D. I,II,III and IV

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31. Figure 7 shows movement of substances X and Y across plasma membrane.

Figure 7

What are the possible substances X and Y?

A. I and II only

B. III and IV only

C. I,II and IV only


32. Figure 8 shows the condition of a mustard green (sawi) stem before being immersed in

30% sucrose solution for 30 minutes.

Figure 8

Which of the following shows the condition of the stem after 30 minutes?

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X Y

I sodium ions glucose

II amino acid glucose

III amino acid vitamin AIV potassium ions oxygen


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33. Which of the following shows the shape of a plant cell after putting it into a hypotonic

solution for 1 hour?

34. Figure 9 shows erythrocytes (red blood cell) and a plant cell put into three solutions with

different concentrations.

Figure 9

Which of the following shows osmotic concentration of solutions Q,R and S respectively?

Solution Q SolutionR SolutionS

A Hypertonic Hypotonic Isotonic

B Isotonic Hypotonic Hypertonic

C Hypertonic Hypertonic Isotonic

D Isotonic Hypertonic Hypotonic

35. Figure 10 shows two visking tubings, X and Y, which are soaked in 5% sucrose solution.

Figure 10

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Visking tubing X is filled with distilled water and visking tubing Y is filled with 40% sucrose

solution. What will be the condition of both tubing after half an hour?

TubingX Tubing Y

A firm firmB firm soft

C soft firm

D soft soft

36. What is the importance of nucleic acids?

A. Build cells for growth

B. Main source of energy in cells

C. Required for the synthesis of antibodies

D. Carry genetic material

37. Which of the following is not a function of water?

A. Provides a moist surface for the diffusion of gases

B. Facilitates the movement of joints

C. An insulator of heat in the body

D. Facilitates the hydrolysis of food by enzymes

38. Proteins that provide all the essential amino acids are

I. Plant proteins

II. Animal proteins

III. First class proteinsIV. Second class proteins

A. I and III only

B. I and IV only

C. II and III only

D. II and IV only

39. Which substrate and enzyme are incorrectly matched?

Substrate Enzyme

A starch salivary amylase

B lactose lactaseC lipid lipase

D peptide amylase

40. Which of the following statement most accurately explains the changes that occur in an

enzyme molecule when subjected to high temperature?

A. The charges at the active site are changed

B. The chemical bonds in the enzyme molecules break down

C. The molecular structure of the active site changes

D. The active site becomes inactive

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44. Figure 11 shows a cell undergoing mitosis. Which stage of mitosis is shown in figure 11?

A. Prophase C. Telophase

B. Metaphase D. Anaphase

45. The parts labelled X and Y represent

46. Figure 12 shows one of the stages in mitosis.

Figure 12

The processes that occur

before and after this stage are

47. Figure 13 shows the cell cycle of a cell, beginning fromP.

Figure 13

The synthesis of DNA occurs during

A. P C. S

B. R D. Q

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X Y

A chromosome centromere

B chromatid centromere

C chromatin centrioles

D chromosome centrioles

Before After

A anaphase telophase

B metaphase anaphase

C prophase metaphase

D metaphase telophase


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48. Figure 14 shows the stages of mitosis.

Figure 14

Which of the following shows the correct sequence of the events?

A. S,Q,P,R C. Q,P,S,R

B. R,Q,P,S D.P,Q,R,S

49. Which of the following phenomena of life occur through mitosis?

I. Growth of zygote into an embryo

II. Replacement of damaged cells

III. Cloning

IV. Asexual reproduction in plantsA. I and III only

B. I,II and III only


D. I,II,III and IV

50. A somatic cell has 8 chromosomes. What is the product after the cell undergoes complete

mitosis?

A. 4 daughter cells with each having 4 chromosomes

B. 2 daughter cells with each having 4 chromosomes

C. 2 daughter cells with each having 8 chromosomes

D. 1 daughter cell which has 8 chromosomes

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**************************END OF QUESTION PAPER************************

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Mid Year Examination 2010