Term Test Qp 1

7/30/2019 Term Test Qp 1

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H. DH.ATOLL SCHOOL VAIKARADHOO

FIRST TERM TEST -2013

GRADE 8

BIOLOGY-PAPER-1

NAME OF THE STUDENT:

INDEX NO: REG NO: Date: Time: 60 min Max mark: 40

1. The concentration of nitrate ions in a root cell is higher than in the surrounding

solution.

How do the nitrate ions move into the root cell?

A. Active transport

B. Diffusion

C. Osmosis

D. Transpiration

2. Starch is digested to maltose by the enzyme amylase.

According to the lock and key hypothesis, which is the key and which is the

lock?

Key Lock

A Amylase Maltose

B Amylase Starch

C Starch Amylase

D Starch Maltose

3. What is the function of each type of plant cell?

Palisade cells Phloem cells Root hair cells

A Photosynthesis Sugar transport Ion uptake

B Photosynthesis Sugar transport Transpiration

C Transpiration Photosynthesis Ion uptake

D Transpiration Photosynthesis Sugar transport

4. The table shows the nutrients in different parts of a meal.

Which food would be most useful in preventing constipation?

Food Energy(KJ)

Protein(g)

Fat(g)

Carbohydrate(g)

Fibre(g)

A Apple juice 163 0.1 0 9.4 0

B Ripe banana 466 1.5 0.4 27.0 4.9

C Salad sandwich 1054 19.0 7.3 27.0 6.1

D Toffee bar 458 2.1 3.3 19.0 1.1


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5. The diagrams shows a photosynthesis investigation. The plant has leaves that

are green in the middle and round white round the edges.

Which leaf areas lack only one factor needed for photosynthesis?

A. P and Q

B. P and R

C. Q and S

D. R and S

6. In which order do these events occur in human nutrition?

A. Digestion Ingestion Absorption Assimilation

B. Digestion Ingestion Assimilation AbsorptionC. Ingestion Digestion Absorption Assimilation

D. Ingestion Digestion Assimilation Absorption

7. Tennis players often eat bananas during long matches.

Which nutrient in a banana is important during the match?

A. Carbohydrate B. Fibre C. Iron D. Vitamin C

8. During translocation in plants, what substances is moved from which organ to

which organ?

Substance From To

A Sucrose Anthers StigmasB Sucrose Leaves Roots

C Water Roots leaves

D Water Soil Root hairs

9. In the body of a human, which processes consume energy from respiration?

Absorption of water Cell division Protein synthesis

A Needs energy Needs energy Needs energy

B Needs energy Needs energy Dont need energy

C Needs energy Dont need energy Needs energyD Dont need energy Needs energy Needs energy


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10. Which statement is not correct?

A. Anaerobic respiration releases less energy than aerobic respiration.

B. The sun is the principle source of energy input into biological systems.

C. Energy flowing through biological systems is recycled.

D. Active transport is an energy-consuming process.11. The table shows some characteristics of four types of cells.

Which cell could be a root hair cell?

Nucleus Chloroplast

A Present Present

B Present Absent

C Absent Present

D Absent Absent

12. The graph shows the effect of changing light intensity on the rate of

photosynthesis in a plant at two different carbon dioxide concentrations.

Which statement is correct?

A. At low light intensities carbon dioxide is the limiting factor.B. At high light intensities carbon dioxide is the limiting factor.

C. When the carbon dioxide concentration is high, there is no limiting

factor.

D. When carbon dioxide concentration is low, the plant cannot

photosynthesis

13. Two aquarium tanks are set up as shown.

After a week, all the animals in tank Y show signs of distress.

This was because the animals have run out of

A. CO2 B. Food C. Nitrate D. Oxygen


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14. Which substances are needed in the diet to prevent rickets?

A. Calcium & Vitamin-C C. Iron & Vitamin-C

B. Calcium & Vitamin-D D. Iron & Vitamin-D

15. The diagram shows part of the human digestive system.

Which part secretes an acidic digestive juice containing a protease?

16. Which substance is produced in both aerobic respiration in humans &

anaerobic respiration in yeast?

A. Carbon dioxide C. Lactic acid

B. Ethanol D. Water

17. The body can regulate both its temperature and the amount of water in its

cells. What are these processes?

A. Assimilation C. HomeostasisB. Excretion D. Osmosis

18. The presence of high concentration of nitrogen-containing fertilizers in a pond

can lead to the death of fish.

What is the sequence of events leading to the death of the fish?

A Increase in algae Algae die Increase in bacteria Drop in oxygen

B Increase in algae Drop in oxygen Increase in bacteria Algae die

C Increase in bacteria Drop in oxygen Increase in algae Algae die

D Increase in bacteria Increase in algae Algae die Drop in oxygen

19. A plant has 20 chromosomes in its leaf cells. The plant reproduces both

sexually and asexually. What is the correct number of chromosomes in the

gametes and in the cells used for asexual reproduction?

Number of chromosomes

Gametes Cells used for asexual reproduction

A 10 10

B 10 20

C 20 10D 20 20


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20. The diagram shows three different cells, not drawn to the same scale.

Which are animal cells?

A. 1 & 2 only B.1 & 3 only C.2 & 3 only D.1,2 & 3

21. Which is an example of active transport?

A. Movement of glucose into the cells of the villi

B. Movement of glucose molecules down a concentration gradient

C. Movement of ions in blood plasma

D. Movement of water in the transpiration stream

22. Five pieces are cut from a potato, all of equal size & shape. The pieces are

then placed in sugar solution of different concentrations. After four hours, the

change in length of each potato piece is measured.

The results are shown in the graph.

Which concentration of sugar solution has approximately the same water

concentration as the potato?

A. 0.00 mol dm-3 B. 0.15 mol dm-3 C. 0.30 mol dm-3 D.0.40 mol dm-3

23. What is due to the lack of magnesium ions in plant leaves?

A. All leaves very dark green C. Wilting of the leaves

B. Leafs yellow between the veins D. Young leaves become long & thin

24. The diagram shows an experiment to investigate the volume of gas produced

by an aquatic plant under different conditions of light intensity and

temperature.


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Which conditions result in the greatest production of gas by the plant?

Light intensity temperature

A High 5

B Low 5

C High 25

D low 2525. The graph shows the rate of photosynthesis in a plant in full sunlight at two

different temperatures and different concentrations of carbon dioxide.

At normal atmospheric carbon dioxide concentrations, the rate of

photosynthesis

A. Is limited by carbon dioxide. C. Is limited by temperature

B. Is limited by light. D. Is not limited

26. Only two of the following statements accurately describe what happens in the

mouth.

A. Amylase breaks down large starch molecules into smaller maltose

molecules.B. Chewing increases the surface area of food for digestion.

C. Saliva emulsifies fats into smaller droplets.

D. Teeth break up large insoluble molecules into smaller soluble

molecules.

Which statements are correct?

A. 1 & 2 B.2 & 3 C.3 & 4 D.1 & 4

27. The diagram shows a root hair absorbing ions from the surrounding soil.

What will assist the uptake of ions by the root hair?

A. A higher concentration of ions in the root hair than in the soil

B. A low temperature in the surrounding soil

C. Rapid uptake of water from the soil by osmosis

D. The large surface area of the root hair.


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28. Why is it important to control the amount of nitrate fertilizer used on farm

land?

A. Nitrate causes acid rain which kills trees and fish.

B. Nitrate decreases the fertility of the soil.

C. Nitrate may lead to excessive growth of water plants.D. Nitrate poisons many kinds of crop plants.

29. The diagram shows some cells in a root of an actively growing plant.

How does the water potential of the cell marked 2 differ from the water

potential of the cell marked 3 and how do mineral ions mainly enter the cell

marked 1?

Water potential of thecell marked 2

Mineral ions mainlyenter the cell marked 1

A Higher than cell 3 By active transport

B Higher than cell 3 By diffusion

C lower than cell 3 By active transport

D lower than cell 3 By diffusion

30. The mass of a cube of fresh potato is found.it is then placed in a test-tube

containing a dilute solution of sucrose. After a day, its mass has increased.

Which process has occurred and what has happened to the concentration ofthe sucrose in the solution in the test-tube?

Process Sucrose concentration

A Active transport Decreased

B Active transport Increased

C Osmosis Decreased

D Osmosis Increased

31. Which statement about enzymes is essential to the lock and key hypothesis?

A. Enzymes molecules are catalysts.

B. Enzymes molecules can be damaged by high PH values.C. Enzymes molecules can be damaged by high temperatures.

D. Enzymes molecules each have a distinct shape.

32. Magnesium is an essential element for

A. The formation of cell walls.

B. The formation of chlorophyll.

C. The formation of proteins.

D. The process of cell division


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33. The graph shows the effects of carbon dioxide and light intensity on the rate

of photosynthesis.

Which statement is supported only by evidence from the graph?

A. Carbon dioxide limits the rate of photosynthesis at low light intensities.

B. Light intensity and carbon dioxide both limit the rate of photosynthesis.

C. The rate of photosynthesis is proportional to light intensity.

D. Temperature affects the rate of photosynthesis.

34. Where and how does carbon dioxide enter a plant?Where How

A Root hair cells Active uptake

B Root hair cells Diffusion

C stomata Active uptake

D Stomata Diffusion

35. The waterweed shown in the apparatus is illuminated and is

photosynthesizing. The rate is measured by bubbles of gas released.

After a few minutes the bubbles cease.

Which factor in the water might be limiting the rate of photosynthesis?

A. Carbon dioxide B. Magnesium C. Nitrate D. Oxygen

36. Which equation represents anaerobic respiration in yeast?

A. Glucose alcohol & CO2. B. Glucose alcohol & H2O.

C. Glucose lactic acid & CO2 D. Glucose lactic acid & H2O

37. Bread contains dietary Fibre, fat, protein and starch.

Which substance contributes least to the energy obtained by a person eating

the bread?

A. Dietary Fibre B. Fat C. Protein D. Starch


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38. Which row in the table correctly identifies the deficiency diseases caused by

lack of vitamin c, calcium and iron?

Lack of vitamin C Lack of calcium Lack of iron

A Anaemia Rickets Scurvy

B Brittle bones Anaemia Rickets

C Rickets Scurvy Brittle bones

D Scurvy Brittle bones Anaemia

39. Which of these processes requires energy for respiration?

Diffusion Osmosis

A Energy required Energy required

B Energy required Energy not required

C Energy not required Energy required

D Energy not required Energy not required

40.

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