Exam Bio F4 T1-2010.11

8/7/2019 Exam Bio F4 T1-2010.11

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ASJA BOYS’ COLLEGE CHARLIEVILLE

END OF TERM EXAMINATION

TERM 1

FORM 4IC & 4AHBIOLOGY

Nov/Dec 2010

General proficiency

2 ½ hours

NAME: ________________________________________

DATE: _________________________________________ FORM: _____________

DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO

READ THE FOLLOWING INSTRUCTIONS CAREFULLY

1. There are THREE SECTIONS in this booklet. Answer ALL questions.

Section A is 30 marks, Section B is 40 marks and Section C is 30 marks.

SECTION A

2. Section A contains 30 multiple choice questions. Write your answer in the answer sheet

provided and return it at the end of the examination.

SECTION B

3. Section B contains TWO structured type questions. Answer each question in the spaces

provided on the question paper.

SECTION C

4. Section C contains TWO essay type questions. Answer each question on a separate page in

your answer booklet and attach to the question paper.

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SECTION A

There are 30 multiple choice questions in this paper.

Answer ALL questions.

TOTAL 30 MARKS

1. Leguminous plants can contribute to soil

fertility because they

(A) remove toxic substances(B) contain nitrogen-fixing bacteria

(C) add elements

(D) maintain the moisture content

Item 2 refers to the following information.

Two organisms were found in the same tree.

They were examined and their

characteristics recorded as shown in thetable below.

Characteristics X Y

Hard exoskeleton √ √

Antennae √ √

Wings 0 √Segmented body √ √3 pairs of legs √ 0

Key: Present √ Absent 0

2. Which of the following statements issupported by the information in the table?

(A) Both X and Y are insects.

(B) Both X and Y are arthropods but

only X is an insect.

(C) X is an insect but Y is not.(D) Neither X nor Y is an insect.

3. In an ecosystem, the organisms which makesolar energy available to all other organisms

are the

(A) producers

(B) decomposers

(C) primary consumers

(D) secondary consumers

4. The bush pig, which has been observed to

feed on a diet of plant roots as well as birds’

eggs, is

(A) a herbivore(B) a carnivore

(C) an omnivore

(D) a detritivore

Item 5 refers to the following diagram of a

food web found in leaf litter.

5. The numbers of trophic levels illustrated inthe food web is

(A) 2

(B) 3(C) 4

(D) 7

6. A plant which has reduced leaves with no

chlorophyll, lacks a proper root system, and

flowers abundantly, is MOST likely to be

found

(A) in a habitat where water is scarce

(B) living parasitically on another plant(C) growing in an area where there are

few insects

(D) existing as a commensal with other green plants

Decaying leaf litter

Snail Millipede Wood louse

Beetle Larvae Ground Beetle

Wolf Spider

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Item 7 refers to the following diagram of the

nitrogen cycle.

7. Which of the following bacteria will be

active at L?

(A) Denitrifying

(B) Nitrifying(C) Nitrogen fixing

(D) Putrefying

8. Which of the following cell structures areassociated with energy transfer?

1 Chloroplast 11 Mitochondrion111 Nucleus 1V Cell membrane

(A) 1 and 11 only(B) 1 and 111 only

(C) 11 and 111 only

(D) 11 and 1V only

9. Which of the following statements is NOT

true about a decomposer?

(A) They release nutrients for recycling

(B) They prevent the accumulation of

dead organic matter.(C) They are more abundant in damp

places.

(D) They are favoured by lowtemperatures.

10. If all the trees in a large area of forest were

destroyed by disease, what would be theMOST likely effect on the composition of

the air in the long term?

(A) The level of carbon dioxide would

decrease

(B) The level of carbon dioxide would

increase(C) There would be no change in the

composition of the air

(D) There would be more oxygen

11. When a seedling looses water to theatmosphere faster than it can be obtained

from the soil, the turgidity of the cells

(A) decreases and the seedling wilts

(B) decrease and the seedling does not wilt(C) increases and the seedling wilts

(D) increase and the seedling does not wilt

Item 12 refers to the following diagram of a cell.

12. The structure labelled 7 is found in

(A) animals(B) fungi

(C) bacteria(D) green plants

13. Which of the following pairs of organism

possesses the requirements for making

carbohydrates from inorganic materials?

(A) Algae and flowering plants

(B) Bacteria and fungi(C) Fungi and flowering plants

(D) Viruses and algae

L

1

23

4

5

6

7

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Item 14 refers to the following structures found inthe leaf of a flowering plant.

Epidermis

Mesophyll layersGuard cells

Vein

14. Which of the following structures containchloroplasts?

I and III and III

II and III

II and IV

15. Which of the following organisms has the

LEAST need for a transport system?

AmoebaHoney bee

SeedlingTadpole

Item 16 refers to the following diagrams whichillustrate the result of an investigation.

16. The process demonstrated in the diagram

above is responsible for

(A) minerals entering root cells

(B) water entering root cells(C) carbon dioxide entering leaf cells

(D) starch entering phloem cells

17. Sodium hydroxide and copper sulphate

solution will produce a violet colour withmolecules of

(A) fat(B) starch

(C) sugar

(D) protein

18. Which of the following is true of

photosynthesis and respiration in green

plants?

(A) Photosynthesis occurs in the day

while respiration occurs in the night.(B) Photosynthesis never occurs in the

dark while respiration occurs only in

the dark (C) Photosynthesis occurs in the light

while respiration occurs both in thelight and in the dark.

(D) Photosynthesis occurs only in thesunlight and respiration takes over

when photosynthesis ceases.

Items 19 and 20 refer to the following diagram of

the human alimentary canal.

In answering items 19 and 20, match each item with

one of the labelled parts above. Each part may be

used once, more than once or not at all.

19. A muscular tube that moves food

down by peristalsis.

20. Receives chime from the stomach

and secretions from the gall bladder and pancreas.

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21. The graph shows how the rate of photosynthesis of a plant varies with light

intensity at two different carbon dioxide

concentrations. The temperature is keptconstant at 20ºC.

Which factor is limiting the rate of

photosynthesis at X?

(A) availability of chlorophyll(B) availability of water

(C) concentration of carbon dioxide

(D) intensity of light

22. The oxygen released during the process of

photosynthesis comes from the

(A) Carbon dioxide(B) Water

(C) Degraded glucose molecules

(D) Air spaces within the leaves

23. What would happen to the body cells if the

blood supplying them became too

concentrated?(A) Burst

Lose salts

Lose water Become turgid

24. An autotroph(A) Feeds on dead animal and plant

material

) Feeds on plants only(C) Feeds on animals only

D) Makes its own food

25. Compared to a regular diet, a vegetarian dietwill contain more

A) First class protein

) Iron) Anaemia

) Roughage

26. One of the problems with nutrition for a

vegetarian is that(A) fats and oils are not produced by

plants

(B) large quantities of food are needed tosupply essential amino aids

(C) vitamins produced by plants are of

inferior quality

(D) large quantities essential mineralnutrients

Items 27 and 28 refer to the followinggraph which shows the activity of two

enzymes in the human digestive system.

27. Which of the following enzymes could be

enzyme II?

(A) Pepsin

(B) Renin(C) Trypsin

(D) Amylase

28. Enzyme I will function BEST in the

(A) Mouth

(B) Stomach(C) Small intestine

(D) Large intestine

29. Bile empties into the

(A) duodenum

(B) caecum

(C) ileum(D) stomach

30. Which of the following nutrients areimportant in the diet for development of

strong bones and teeth?

(A) Calcium and iron(B) Phosphorus and iron

(C) Vitamin C and calcium

(D) Phosphorus and calcium

I II

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SECTION B

This section contains 2 structured questions.

Answer ALL questions.

1. The four animals, A, B, C and D, shown in Figure 1 below, are all members of the same major

group. They are said to be one of the most successful groups if living organisms because they

are found abundantly in every type of habitat.

Figure 1. Animals of the Same Major Group

Identify TWO characteristics which can be used to put these four organisms into different

sub-groups.

______________________________________________________________________________

[2 marks]

In the space provided below, accurately draw Specimen A twice the size shown in Figure 1. In the drawing

include one annotation, a title and state the magnification of your drawing.

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[9 marks]

(c) (i) State THREE ways in which lizards are different from the group of animals shown in Figure 1

above.

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

[3 marks]

(ii) To which of the four animals shown above is the cockroach most closely related? Give TWO

reasons for your answer.

_____________________________________________________________________________

_____________________________________________________________________________

_____________________________________________________________________________

[3 marks]

(d) Briefly describe B using the heading below:

Shape: _______________________________________________________________________

Anterior end: __________________________________________________________________

Appendages: ___________________________________________________________________

_____________________________________________________________________________

_

[3 marks]

(e) Which TWO features of the group shown in Figure 1 do you think have made them “successful”animals? Give a reason for EACH feature mentioned.

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

[4 marks]

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(f) What method would you use to collect a sample of any TWO of the organisms shown in Figure 1

for further study?

______________________________________________________________________________

______________________________________________________________________________

[1 mark]

Total 25 marks

2. Figure 2 below represents one cell from a plant and one from an animal.

Figure 2. Plant and animal cells as seen under a light microscope.

(a) (i) Using only the letters P, Q and R label the structures on both cells that perform EACH of thefollowing:

a) Produce ATP (P)

b) Synthesis protein (Q)

c) Allow substances to enter and leave the cell (R) [6 marks]

(ii) Using the letters S and T, label the structure on Cell 2 ONLY that performs EACH of thefollowing functions:

a) Converts light chemical energy (S)

b) Allows a wide range of substances to pass through (T) [2 marks]

(b) (i) Name structure X shown in Cell 1.

_____________________________________________________________________________

[1 mark]

(ii) Structure X is absent from mature red blood cells and sieve tubes.Suggest one process which these cells will not be able perform.

Give a reason for your answer.

Process:

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______________________________________________________________________________

Reason:

______________________________________________________________________________ [2 marks]

(c) (i) What is likely to occur in Cell 1 and 2 of Figure 2 if they were placed in distilled water for over

half-an-hour?

Cell 1:________________________________________________________________________

_____________________________________________________________________________

Cell 2:________________________________________________________________________

_____________________________________________________________________________

[2 marks]

(ii) Explain why the changes in Cell 1 might be different from the changes in Cell 2 after half-an-

hour in distilled water.

_____________________________________________________________________________

_____________________________________________________________________________

[2 marks]

Total 15 marks

TOTAL 40 MARKS

SECTION B

Answer ALL questions from this section.

4. (a) (i) Using ONLY a fully annotated diagram of the internal structure of a leaf, explain the role of

the parts involved in photosynthesis. Include in EACH annotation the name of the structure and

its function.

(ii) Write a balanced equation that effectively summarises photosynthesis.

[11 marks]

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(b) (i) One effect of hurricanes is the complete removal of foliage (leaves) from trees. Many trees seemto readily survive the loss of all their leaves, even though they are the main photosynthesizing

organs. Explain how this is possible.

(ii) Gardeners sometimes remove leaves and branches from trees with the expectation of improving

their yield. Suggest why this is a good practice.

[4 marks]

Total 15 marks

5. (a) (i) Describe the structure of a typical mammalian tooth.

Use a simple diagram to show what you would see if an incisor were cut in half horizontally.

[7 marks]

(b) Old people sometimes lose all their teeth. How might the loss of all the teeth affect their diet?

[4 marks]

(c) How do plants use the many digestive enzymes that they have? Do you think these enzymes are

as important to plants as they are for animal nutrition?Explain your answer fully. [4 marks]

Total 15 marks

TOTAL 30 MARKS

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Page 12 of 12

TOTAL 100 MARKSEND OF TERM EXAM

Ms. Indira C. Have great holiday Boys!!!

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Exam Bio F4 T1-2010.11