1. All living things are made up of basic units called….. A nucleus B cells C cytoplasm D nucleoplasm

2. Diagram 1 shows an animal cell.

What is the structure labeled X? A Nucleus B Golgi apparatus C Mitochondrion D Rough endoplasmic reticulum

3. Which of the following cellular components is not found in an animal cell?

A C

B D

4. Which of the following organelles is covered with ribosomes on its outer surface? A Smooth endoplasmic reticulum B Rough endoplasmic reticulum C Golgi apparatus D Mitochondria

5. Diagram 3 shows an organism

The organism shown above reproduces by…I. Forming sporesII. buddingIII. binary fissionIV. regeneration

A. I and IIB I and IIIC II and IVD II, III, and IV

6. What are the main functions of the nervous system?

I. detects stimuli II. transmit nerve impulses and integrates the activities of other systems III. controls the physiological processors in conjunction with the endocrine system IV. regulates the osmotic balance of the blood

A II and I B III and II C I, II and III D I, II, III and IV

7. Defends the body against infection Returns excess tissue fluid to the

blood

The above statement refers to the … A endocrine system B lymphatic system C muscular system D excretory system

8. Which of the following are the physical factors that affect the internal environment of organisms

I temperature II blood pressure III osmotic pressure IV pH

A I and II B II and IV C I, II and III D II, III and IV

9. Which of the following is not a plant organ? A Leaves B Stems C Xylems D Flowers

10. What will happen if plants do not have cell walls? A Unwanted substances would enter the cell. B Plant cells would lose their shape and rigidity. C Useful substances would flow out of the cell. D Activities of the cell cannot be carried out.

11. Diagram below shows the structure of a plasma membrane based on the fluid mosaic model.

What is X and Y?X Y

A Lipid ProteinB Protein LipidC Protein PhospholipidD Phospholipid Protein

12. Which of the following processes involve diffusion?

I The intake of oxygen into the alveolus II The absorbtion of glucose and amino acids by cells in the villi of the small intestine. III The absorbtion og digested food through the villi of the small intestine. IV The intake of mineral ions by the root hairs of a plant.

A I and II only B I and III only C I, III and IV only D I, II, III and IV

13. Which of the following processes is involved in the transport of sodium ions against the concentration gradient? A Osmosis B Active transport C Simple diffusion D Facilitated diffusion

14. Which of the following molecules move across the plasma membrane by simple diffusion? I Water II Oxygen III Starch IV Carbon dioxide

A I and II only B I, II and IV only C II, III and IV only D I, II, III and IV

15. An experiment is carried to study the movement of substances across the Visking tubing. The result of the Benedict’s test and the iodine test at the beginning and at the end of the experiment are shown in table in below.

Test Colour of the liquid in boiling tube Beginning of experiment End of experiment

Benedict’s test

Blue solution Brick red precipitate

Iodine test Brown solution Brown solution

What inference can be made from the experiment?

A The Visking tubing is permeable to glucose molecules.B The Visking tubing is permeable to starch molecules.C The Visking tubing is permeable to both glucose and starch.D The Visking tubing is not permeable to glucose and starch molecules.

16. Which of the following processes involves active transport? A Uptake of icons by root hair cells of a plant B Absorption of digested food in the villus C Absorption of water by root hair cells of a plant D Gaseous exchange between the alveoli and the blood capillaries.

17. Diagram 7 shows the structure of a plant cell before and after it has been immersed in solution P.

What is solution P and the process that takes place in the plant cell?

Solution P Process

Distilled water Plasmolysis

Distilled water Deplasmolysis

10% sucrose solution

Plasmolysis

15% sucrose solution

Haemolysis

18. The diagram shows a strip of a mustard green after it has been immersed in solution Z.

Which of the following is solution Z? A 0.1% salt solution B distilled water C 1.5% sucrose solution D 30% sucrose solution

A

B

C

D

19. A piece of an onion epidermis is placed in 30% sucrose solution. Which of the following shows the shape of the cells after 30 minutes.

A

B

C

D

20. Which of the following correctly describes the effects of excessive use of chemical fertilisers?

I the soil solution becomes hypertonic II the roots cells become flaccid III the plasma membrane of the root cells are destroyed IV Causes wilting in plant A II and IV only B I.II,ang IV only C II,III,and IV only D I,II,III,and IV

21.Which of the following substance acts as a medium for biochemical reactions in a cell?A WaterB LipidC GlucoseD Amino acid

22.The diagram shows the structure of a nucleotide.

What are represented by the units labeled as X, Y and Z?X Y ZPhosphate group

Nitrogenous base

Sugar

Phosphate group

Sugar Nitrogenous base

Sugar Phosphate group

Nitrogenous base

Nitrogenous base

Sugar Phosphate group

23.Which of the following carbohydrates are examples of polysaccharides?I StarchII LactoseIII GlycogenIV CelluloseA I, II and III onlyB I, III and IV onlyC II, III and IV onlyD I, II, III and IV

24.Which of the following carbohydrates has a structure as shown in the diagram?

A StarchB GlycogenC GalactoseD Cellulose

25.Which of the following have the structure of a protein as shown in the diagram?

I EnzymesII AntibodiesIII CholesterolIV HaemoglobinA I and II onlyB I, II and IV onlyC II, III and IV onlyD I, II, III and IV

26.Which of the following statements about protein is not true?A The monomer of protein is amino acid.B Non-essential amino acids cannot be synthesized in humansC The linear sequence of amino acids in protein molecule is called the primary structureD An example of a quartenary-structured proteins in haemoglobin

27.The main types of lipids are listed below, except…A oilsB steroidsC hormonesD phospholipids.

28.The diagram shows a structure of one lipid molecule

The part labeled Q representsA phosphateB glycerolC fatty acidD amino acid

29.The diagram shows the mechanism of an enzyme reaction on a substance

What conclusion can be made about the characteristics of an enzyme?I An enzyme reaction is very specificII An enzyme reaction is affected by temperatureIII An enzyme speeds up the rate of chemical reaction.IV An enzyme remains unchanged at the end of the reaction.A I and IV onlyB II and IV onlyC I, III and IV onlyD I, II, III and IV

30.Which of the following graphs shows the effect of temperature on the rate of an enzyme-catalysed reaction?

31.The diagram shows a stage in a cell division

This stage of cell division is A metaphase B anaphase I C anaphase D metaphase I

32.Which of the following shows the correct sequence for cell division? I G2

II G1

III M IV S A I, II, III IV B II, IV, I, III C I, II, IV, III D II, III, IV, I

33. Arrange the diagrams in the right sequence for mitosis.

A IV, III, I, IIB I, IV, II, IIIC III, II, I, IVD II, I, IV, III

34.Which of the following cells shows the cell at the mitotic metaphase stage?

35.The figure shows the stages of division by mitosis

Which of the following shows the correct sequence of the events?A S, Q, P, RB R, Q, P, SC Q, P, S, RD P, Q, R, S

36.All somatic cells that are diploid originate from theA gameteB autosomeC chiasmaD zygote

37.The diagram shows a phase in nuclear division

What is this phase?A prophaseB anaphaseC metaphaseD telophase

38.Which of the following statements are true about mitosis?I produces two daughter cells that are diploidII daughter cells are the same genetically as the parent cellIII chromatid pairs separate during the anaphase stageIV homologous chromosomes undergo synapsis during the prophase stage.A I and II onlyB II and IV onlyC I, II and III onlyD II, III and IV only

39. Which of the following substances may bring harm to the process of mitosis and meiosis?I X-rayII FungicidesIII BenzeneIV Mustard gasA I and III onlyB II and IV onlyC I, II and IV onlyD I, II, III and IV

40. The diagram shows an animal cell at one of the stages in meiosis.

Which of the following is the number of chromosomes in the daughter cells after the division?

A n = 2B n = 4C n = 8D n = 16

41. The following statements are about an organelle of a cell.

What is the organelle?

A Vacuole C Golgi body

B Nucleus D Ribosome

Exists freely in the cytoplasm or is attached to the rough

endoplasmic reticulum.

Site of the protein synthesis

42. The diagram shows the liquid composition of the human body.

Which of the following form the internal environment?

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

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

43. Which of the following is a connective tissue?

A C

B D

44. What are the processes involved in the movement of water and mineral ions into

root hairs?

Water Mineral ions

A. Facilitated diffusion Osmosis

D. Active transport Osmosis

C. Osmosis Active transport

D. Osmosis Facilitated diffusion

45 Which of the following onion cells were immersed in a hypotonic solution?

46. The graph shows the changes in mass of potato strips immersed in different

concentrations of sucrose solution.

Based on the above graph which of the following concentrations of sucrose

solution should be used so that a flaccid potato strip regains its turgidity?

A 1.5 g per 100 ml C 3.5 g per 100 ml

B 2.5 g per 100 ml D 4.5 g per 100 ml

47 A plant cell is immersed in distilled water.

Which of the following is true about the movement of the water molecules in the

early stage ?

A No water molecules are entering or exiting the cell

B. The rate of water molecules entering and exiting the cell is the same

C. The rate of water molecules entering the cell is higher than exiting the cell

D. The rate of water molecules exiting the cell is higher than entering the cell

48 The diagram shows the molecular structure of three food classes.

Which food classes do X, Y and Z belong to?

X Y Z

A Carbohydrate Protein Lipid

B Protein Carbohydrate Lipid

C Protein Lipid Carbohydrate

D Lipid Carbohydrate Protein

49. Diagram below shows the rate of enzyme hydrolysis reaction, R and S in the

human body.

Which of the following is true about enzymes R and S?

Enzyme R Enzyme S

A Secreted in the stomach Secreted into the duodenum

B The active site changes at pH

more than 4

The active site changes at pH

more than 7

C R is trypsin S is lipase

D Synthesized in the rough in the

endoplasmic reticulum

Synthesized in the smooth

endoplasmic reticulum

50 The diagram below shows the breaking down of complex molecules by an enzyme. Which of the molecules A, B, C and D represents the substrate?

Answer scheme1. B 11. D 21. A 31. C 41. D2. B 12. B 22. B 32 B 42. C3. D 13 B 23. B 33. C 43. A4. B 14. B 24. A 34. B 44. C5. B 15. A 25. A 35. A 45. A6. C 16. A 26. B 36. D 46. A7. B 17. B 27. C 37. C 47. C8. C 18. D 28. B 38. C 48. B9. C 19. D 29. A 39. D 49. A10. B 20. B 30. B 40. A 50. B