biology f4

8/10/2019 biology f4

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I nstructions : Answer all the questions. Each question is followed by four alternative

answers, A, B, C and D. Choose one correct answer for each question.

1. Diagram 1 shows Amoeba sp. What is the part labelled P?

Diagram 1

A Nucleus

B Cytoplasm

C Food vacuole

D Plasma membrane

2. Diagram 2 shows the reproduction of Amoeba sp. What is this method of reproductioncalled?

Diagram 2

A Regeneration

B Binary fission

C Spore formation

D Sexual reproduction


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3. Diagram 3 shows part of the digestive system. The cells of the organ labelled P containa high density of...

Diagram 3

A chloroplasts

B mitochondria

C rough endoplasmic reticulum

D smooth endoplasmic reticulum

4. Which of the following is an organ in the human digestive system?


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5. Diagram 4 shows two organs labelled X and Y. Which of the following do X and Yregulate?

Diagram 4

A The pH level

B The body temperature

C The blood glucose level

D The blood osmotic pressure

6. Diagram 5 shows the structure of an animal cell. Which of the labelled organelles canalso be found in a plant cell?

Diagram 5

A P and Q

B P, Q and R

C Q, R and S

D P, Q, R and S


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7. Diagram 6 shows the levels of cell organisation in a multicellular organism.

Diagram 6

What is X if the stomach is an organ of X?

A The digestive system

B The excretory system

C The circulatory system

D The respiratory system

8. Diagram 7 shows the fluid mosaic model of the plasma membrane. What are the partslabelled P. Q and R made of?

Diagram 7

What are the parts labelled P, Q and R made of?

P Q R

A Lipid Carbohydrate Protein

B Protein Lipid Carbohydrate

C Carbohydrate Protein Lipid

D Lipid Protein Carbohydrate

Cells Tissues Organs X Organism


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9. Diagram 8 shows an aquatic unicellular organism. Oxygen enters and carbon dioxideleaves the organism by a process. What is this process?

Diagram 8

A Osmosis

B Diffusion

C Active transport

D Facilitated diffusion

10. Diagram 9 shows a plant cell. Which of the labelled parts are semi-permeable?

A X and Y

B Y and Z

C X and Z

D X, Y and Z


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11. Magnesium ions (Mg 2+), calcium ions (Ca 2+), potassium ions (K +) and nitrate ions(N0 3-) are absorbed from soil water into the cells of the root hairs of a plant by activetransport. Which of the following graphs shows the concentrations of magnesium ions,calcium ions, potassium ions and nitrate ions in soil water and the cells of the root hairs

of a plant?


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12. Which of the following substances moves across a semi-permeable membrane byosmosis?

A Water

B Oxygen

C Carbon dioxide

D Inorganic ions

13. Diagram 10 shows the change in the condition of a plant cell after being immersed in20% sucrose solution for 20 minutes.

Diagram 10

After that, the plant cell is taken out and placed in solution X for another 20 minutes.The condition of the cell is shown in Diagram 11. What is solution X?

Diagram 11

A Distilled water

B 20% sucrose solution

C 25% sucrose solution

D 30% sucrose solution


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14. Which of the following, differences between simple diffusion and osmosis is correct?

Simple diffusion Osmosis

A Movement of molecules down a

concentration gradient

Movement of molecules against a

concentration gradient

B Requires energy Does not require energy

C Does not involve a semi-permeable

membrane

Involves a semi-permeable

membrane

D Involves only water molecules Involves any molecule

15. Which of the following elements is a component of proteins but not carbohydrates?

A Carbon

B Oxygen

C Hydrogen

D Nitrogen

16. Which of the following carbohydrates is not a disaccharide?

A Sucrose

B Glucose

C Lactose

D Maltose

17. Which of the following substances is a protein?

A Starch

B Enzyme

C Cellulose

D Cholesterol


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18. Diagram 12 shows the formation of a molecule of triglyceride.

Diagram 12

What is this process called?

A Hydrolysis

B Photolysis

C Photosynthesis

D Condensation

19. The following equations show the conversion of disaccharides to monosaccharides.

What are X, Y and Z?

X Y Z

A Glucose Lactose Fructose

B Cellulose Lactose Glucose

C Fructose Lactose Glucose

D Fructose Lactose Cellulose

Sucrose + water glucose + X

Y + water glucose + galactose

Maltose + water glucose + Z


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20. Diagram 13 shows a level of organisation of the structure of proteins.

Diagram 13

What level of organisation is it?

A Primary

B Secondary

C Tertiary

D Quaternary

21. The functions of some proteins are listed below.

What are P, Q and R?

P Q R

A Enzymes Antibodies Carrier proteins

B Antibodies Carrier proteins Enzymes

C Carrier proteins Enzymes Antibodies

D Antibodies Enzymes Carrier proteins

P : To protect against diseases

Q : To transport other substances

R : To speed up chemical reactions


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22. Diagram 14 shows a certain stage of a type of nuclear division. What type of nucleardivision is it?

A Meiosis

B Mitosis

C Cytokinesis

D Binary fission

23. Diagram 15 shows a few stages of mitosis. What happens at stage X?

Diagram 15

A The chromosomes exchange genetic material.

B The chromosomes are arranged along the equatorial plane.

C The sister chromatids separate and move to the opposite poles of the cell.

D The homologous chromosomes separate and move to the opposite poles of thecell.

24. Diagram 16 shows a type of nuclear division.

Diagram 16


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What type of nuclear division is it? What is the reason for your answer?

Types of nuclear

division

Reason

A Mitosis The number of chromosomes remains unchanged

B Mitosis The number of chromosomes is reduced by half

C Meiosis The number of chromosomes remains unchanged

D Meiosis The number of chromosomes is reduced by half

25. In which part of the digestive system does the hydrolysis of starch begin?

A The mouth

B The stomach

C The oesophagus

D The small intestine

26. Anaemia is caused by a deficiency of a certain mineral. What is this mineral?

A Iron

B Calcium

C Potassium

D Magnesium

27. Which part of the digestive system of the rabbit contains bacteria that digest cellulose?

A The mouth

B The caecum

C The rectum

D The stomach


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28. Diagram 17 shows part of the human digestive system.

Diagram 17

Which of the labelled parts, A, B , C or D, produces an enzyme that digests fats?

29. Which organ in the human digestive system produces an enzyme that works well in anacidic medium?

A The mouth

B The stomach

C The pancreas

D The oesophagus

30. Diagram 18 shows an organelle in a plant cell which contains a green pigment.

Diagram 18

Which of the following elements is a component of this green pigment?

A Iron

B Copper

C Sulphur

D Magnesium


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31. Which of the following is not a factor which affects the rate of photosynthesis?

A Temperature

B Water supply

C Intensity of light

D Concentration of carbon dioxide

32. The following equations show two reactions which occur in photosynthesis.

Diagram 19 shows the structure of an organelle in which photosynthesis occurs.

Diagram 19

In which labelled parts do reaction I and reaction II occur?

Reaction I Reaction II

A R P

B Q P

C P R

D R Q

Reaction I:

Reaction II:


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33. Which of the following vitamins helps in the absorption of calcium and phosphorus inthe small intestine for the formation of bones and teeth?

A Vitamin A

B Vitamin C

C Vitamin D

D Vitamin E

34. Diagram 20 shows the human digestive system.

Diagram 20

In which of the labelled organs does the synthesis of bile occur?

35. Diagram 21 shows an organism.

Diagram 21

This organism carries out anaerobic respiration when there is a lack of...

A energy C ethanol

B oxygen D carbon dioxide


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36. In the respiratory system of an insect, air enters and leaves the insect through the...

A cuticle

B spiracles

C body cells

D air sacs

37. Diagram 22 shows a model of the human respiratory system.

Diagram 22

What do the balloons in the model represent?

A The lung

B The diaphragm

C The pleural membrane

D The intercostal muscles

38. Muscle cramps and fatigue are caused by the accumulation of a substance in the humanmuscle cells. What is this substance?

A Ethanol

B Glucose

C Lactic acid

D Carbon dioxide


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41. Which of the following is the correct definition of niche?

A The role of an organism in an ecosystem

B The natural environment in which an organism lives

C A group of organisms of the same species which live in the same habitat

D Different groups of organisms which interact with each other in an ecosystem

42. The quadrat sampling technique was used to determine the percentage coverage of aspecies of grass in a school field. The area of each quadrat was 1 m 2. The results areshown in Table 1.

Quadrat Area covered by the species of grass

1 0.3

2 0.7

3 0.4

4 0.6

5 0.2

6 0.8

7 0.3

8 0.5

Table 1

What is the percentage coverage of this species of grass in the school field?

A 43.5%

B 44.5%

C 45.5%

D 47.5%


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43. Which of the following is a biotic component of an ecosystem?

A Fish

B Wind

C Water

D Oxygen

44. The following is a food chain which involves four organisms in a habitat.

Which of the following examples of P, Q, R and S are correct?

P Q R S

A Plant Frog Grasshopper Snake

B Plant Caterpillar Small bird Eagle

C Plant Caterpillar Grasshopper Snake

D Plant Grasshopper Caterpillar Frog

45. The population of a species of butterfly can be estimated by the technique of capture,mark, release and recapture. Table 2 shows the results.

Number of butterflies

Captured the first time 22

Captured the second time 15

Marked and captured the second time 10

Table 2

P Q R S


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What is the estimated population of this species of butterfly?

A 23 B 43

C 33 D 53

46. Diagram 25 shows the different zones of a mangrove swamp.

Diagram 25

Which of the following diagrams shows the root system of the mangrove trees whichgrow in zone Q?


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47. Which of the following is caused by deforestation?

A Soil erosion

B Eutrophication

C Water pollution

D Thinning of the ozone layer

48. Which of the following is not caused by the emission of thick smoke from factories?

A Acid rain

B Flash floods

C Air pollution

D Breathing difficulties in asthmatic patients

49. The following statement is about a human activity. Chemicals are discharged fromfactories into nearby rivers.

What is the type of pollution caused by this activity?

A Air pollution

B Noise pollution

C Water pollution

D Thermal pollution

50. The following information is about an air pollutant. This air pollutant is acidic andcauses acid rain. What is this air pollutant?

A Hydrocarbon

B Sulphur dioxide

C Carbon dioxide

D Carbon monoxide

Chemicals are discharged from factories into nearby rivers

biology f4

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