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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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TOTAL 100 MARKSEND OF TERM EXAM
Ms. Indira C. Have great holiday Boys!!!