中五 生物試卷 (F5 Biology Past Paper)
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59 students
GENERAL INSTRUCTIONS
St. Stephen's Girls' College
Final Examination 2019-2020
Time allowed : 2 hours
1. There are TWO sections, A and B, in this Paper. You are advised to finish Section A in about 40
2. Section A consists of multiple-choice questions in this question paper. Section B contains
conventional questions printed separately in Question-Answer Book B.
3. Answers to Section A should be marked on the Multiple-choice Answer Sheet while answers to
Section B should be written in the spaces provided in Question-Answer Book B. The Answer
Sheet for Section A and the Question-Answer Book B for Section B will be collected
separately at the end of the examination.
INSTRUCTIONS FOR SECTION A
SECTION A (MULTIPLE-CHOICE QUESTIONS)
1. Read carefully the instructions on the Answer Sheet. After the announcement of the start of the
examination, you should fill in the information required in the space provided. No extra time will
be given for filling in the required information after the 'Time is up' announcement.
When told to open this book, you should check that all the questions are there. Look for the words
'END OF SECTION A' after the last question.
3. All questions carry equal marks.
ANSWER ALL QUESTIONS. You are advised to use an HB pencil to mark all the answers on
the Answer Sheet, so that wrong marks can be completely erased with a clean rubber. You must
mark the answers clearly; otherwise you will lose marks if the answers cannot be captured.
5. You should mark only ONE answer for each question. If you mark more than one answer, you
will receive NO MARKS for that question.
6. No marks will be deducted for wrong answers.
Form 5 Biology Final Examination 2019-2020 (SECTION A)
25. Which of the following comparisons between reflex actions and voluntary actions is incorrect?
Reflex actions
Voluntary actions
B. initiated by receptors
C. the same stimulus leads to the same
D. effectors must be muscles
26. Johny is very hungry. When the waiter puts his favourite dish on the table, his saliva secretion
increases. Which of the following body parts controls this response?
A. cerebrum
C. salivary gland
Directions: Questions 27 and 28 refers to the Figure 1 and Figure 2. Figure I shows a football player
about to use her left leg to kick the ball. Figure II shows the relevant structures of her left leg.
Structure X
initiated in the brain
the same stimulus may lead to different
effectors can be muscles or glands
medulla oblongata
27. Which of the following shows the states of the muscles of the left leg when the football player is
making the action shown in Figure I?
28. Which of the following is a function of structure X ?
A. storing iron
B. protecting the spinal cord
C. destroying red blood cells
D. producing white blood cells
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Form 5 Biology Final Examination 2019-2020 (SECTION A)
29. Which of the following statements about skeletal muscles are correct?
(1) Their contractions are initiated by the cerebrum.
(2) They usually function in opposing pairs.
(3) They store up starch as an energy reserve.
B. (1) and (3) only
D. (1), (2) and (3)
A. (1) and (2) only
C. (2) and (3) only
30. Three men P, Q and R were injured in a traffic accident. Their brains were found to be
functioning properly but other parts of their nervous systems suffered from different types of
damage. The table below shows the tests conducted and the observed results.
Men Test(s) conducted with their eyes Observed results
blindfolded
P's finger tip was pricked by a pin.
Q's finger tip was pricked by a pin.
R's finger tip was pricked by a pin.
Which part of their nervous system was damaged respectively?
motor neurone
sensory neurone
sensory neurone
association neurone to the
D. motor neurone
P withdrew his hand but he could not feel
Q felt the pain but did not withdraw his
R could not feel the pain and did not
withdraw his hand.
association neurone to the
motor neurone
sensory neurone
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association neurone from
motor neurone
sensory neurone
association neurone
- END OF SECTION A-
Go on to Question-Answer Paper B for questions in Section B
Form 5 Biology Final Examination 2019-2020 (SECTION A)
There are 30 questions in this section.
The diagrams in this section are NOT necessarily drawn to scale.
1. The diagram below shows a foetus in the uterus of a woman in the last month of her pregnancy.
(3) To prevent viruses from entering the blood of the foetus.
A. (1) and (2) only
(2) and (3) only
In structure P, the blood systems of the foetus and the
mother are separate. What is the importance of this?
(1) To prevent the high blood pressure of the mother from
damaging the fine blood vessels of the foetus.
(2) To avoid mixing the blood of the foetus and the mother because their blood groups may not
be compatible.
decapitated-
Directions: Questions 2 and 3 refer to the diagram below, which shows an investigation into the
effect of auxins on the growth of plant shoots:
B. (1) and (3) only
(1), (2) and (3)
agar blocks with auxins
a few days later.
Which of the following serve(s) as the control set-up(s) in this investigation?
C. P and Q only
D. Q and R only
3. Which of the following conclusions can be drawn based on the results of the investigation?
A. The tip of the coleoptile produces auxins.
Auxins stimulate the growth of coleoptiles.
The coleoptile shows positive phototropism.
D. Coleoptiles stop growing when the tip is removed.
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Form 5 Biology Final Examination 2019-2020 (SECTION A)
4. The graph below shows the growth rate of humans:
Yearly growth rate in height
(arbitrary unit)
time of germination (day)
Which of the following can be deduced from the graph?
B. The brain grows rapidly from age 0 to age 4.
C. There is no more change in growth for males after age 20.
D. Growth of the reproductive organs begins at age 10 in females.
whole seedling
5. The graph below shows the changes in the dry mass of a soya bean seedling, the cotyledons and
the plumule of the same
seedling during the first 20 days of germination.
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Which of the following correctly explains the increase in dry mass of the soya bean seedling after
A. There was a net production of food in the seedling after day 12.
The seedling carried out photosynthesis after day 12.
The food stored in the cotyledons was broken down to provide energy for growth.
The rate of respiration of the plumule decreased after day 12.
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Form 5 Biology Final Examination 2019-2020 (SECTION A)
6. The table below shows the results of blood group tests from two individuals, X and Y.
Individual X
Individual Y
Blood mixed with solution
containing anti-A antibody
Blood mixed with solution
containing anti-B antibody
Which of the following combinations correctly shows the blood groups of individuals X and Y?
7. What are the consequences of infection of helper T cells by HIV?
(1) B cells cannot recognize the antigens to produce antibodies.
(2) B cells cannot multiply and differentiate to produce antibodies.
(3) T cells cannot differentiate into killer T cells.
(1) and (2) only
(2) and (3) only
No agglutination occurs
No agglutination occurs Agglutination occurs
Which of the following statements about the uterus is incorrect?
The uterus can secrete female hormones.
The uterus is the place where the embryo develops.
The muscle layer of the uterus contracts to push the foetus out of the uterus during labour.
D. The thickness of the uterine lining changes periodically.
(1) R is a decomposer.
No agglutination occurs
(1) and (3) only
(1), (2) and (3)
The diagram below shows the feeding relationships of five different organisms in a habitat.
Which of the following statements about these organisms is/are
S is a secondary consumer in this food web.
The number of P in this habitat must be the highest.
B. (2) only
C. (3) only
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D. (2) and (3) only
Form 5 Biology Final Examination 2019-2020 (SECTION A)
Directions: Questions 10 and 11 refer to the diagram below, which shows the production of
pigment in the eyes of fruit flies. The production of pigment is controlled by two genes. One of
the genes has two alleles, Q and q. The other gene also has two alleles, R and r.
recessive q
(1) and (2) only
C. (2) and (3) only
intermediate
recessive r
10. Two fruit flies, one with cinnabar eyes and the other one with brown eyes, were crossed with
each other. All the F₁ generation had red eyes. Which of the following statements are correct?
(1) The offspring can only inherit the Q allele from the parent with brown eyes.
The offspring can only inherit the R allele from the parent with cinnabar eyes.
Both the parents must be pure-bred.
13. Antibodies are produced by
A. memory B cells
C. specialised B cells
red pigment
11. If two pure-bred fruit flies with cinnabar eyes were crossed with each other, what is the chance
of producing an offspring with red eyes?
(1) and (3) only
D. (1), (2) and (3)
12. The following graph shows the change in the populations of organisms X and Y living in the same
Which of the following is the most likely ecological relationship between organisms X and Y?
A. predation
C. competition
D. commensalism
B. memory T cells
D. specialised T cells
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Form 5 Biology Final Examination 2019-2020 (SECTION A)
Directions: Questions 14 and 15 refer to the diagram below, which shows some processes of the
nitrogen cycle:
nitrogen gas
bacterium T
faeces from cattle
bacterium S
ammonium compounds
bacteria Q and R
nitrogen-containing compounds
14. Which of the following statements about the bacteria shown in the diagram is correct?
P belongs to parasitic bacteria.
B. Q belongs to nitrifying bacteria.
R belongs to nitrogen-fixing bacteria.
D. S belongs to denitrifying bacteria.
16. The diagram below shows a pyramid of numbers.
15. Which of the following bacteria has a similar role to fungi in the cycling of materials?
bacterium P in
root nodules
of the legume
At which trophic level are the individuals the largest in body size?
17. In flowering plants, asexual reproduction is considered less favourable than sexual reproduction
in terms of natural selection because offspring produced from asexual reproduction
are genetically identical to each other.
have keen competition with each other.
cannot invade and colonise new environments.
can grow rapidly only in favourable conditions.
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Form 5 Biology Final Examination 2019-2020 (SECTION A)
18. A scientist carried out an experiment to study the effectiveness of an antibiotic on two different
species of bacteria, X and Y. The bacteria were grown in a nutrient solution containing different
concentrations of an antibiotic and the percentages of surviving bacteria were calculated. The
graph below shows the results.
percentage of surviving bacteria (%)
(1) and (2) only
(2) and (3) only
(2) and (3) only
antibiotic concentration (µg cm ³)
Which of the following statements about the antibiotic are correct?
(1) At a concentration of 0.01 µg cm3, the antibiotic kills more X than Y.
(2) At a concentration of 10 µg cm³, the antibiotic cannot kill all X.
(3) At an antibiotic concentration higher than 10 µg cm3, an increase in antibiotic concentration
would not result in an increase in the number of Y killed.
(1) and (3) only
(1), (2) and (3)
(2) The person will no longer have colour vision.
(3) No image will be formed on the detached part of the retina.
A. (1) only
(1) and (3) only
(1), (2) and (3)
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19. The diagram below shows a section of the eye of a person with a type of eye defect.
part of retina
detached from the
yellow spot
Which of the following descriptions about the above situation is/are correct?
(1) Light sensitive cells on the detached part of the retina will die as they cannot receive oxygen
from the choroid.
Form 5 Biology Final Examination 2019-2020 (SECTION A)
20. The table below shows the presence or absence of some traits in five species:
+ presence of trait
Y and Z only
Which of the following evolutionary trees best illustrates the phylogenetic relationship of the five
absence of trait
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21. The diagram below shows a cross section of a spinal cord. A student thinks about a question and
then raises his hand to ask the question. Which part(s) of the spinal cord will the nerve impulses
pass through to cause the action?
B. X and Y only
D. X, Y and Z
Form 5 Biology Final Examination 2019-2020 (SECTION A)
22. The graph below shows the change in the amount of DNA in an onion root tip cell during a cell
The photomicrographs below show two onion root tip cells.
Which of the following correctly shows the stages which the two onion root tip cells are in?
23. Which of the following structures will vibrate when there are sound waves?
(1) eardrum
(2) ear bones
(3) oval window
A. (1) and (2) only
C. (2) and (3) only
24. Interneurones can be found in
(1) the brain
(2) the spinal cord
(3) the muscles
A. (2) only
C. (2) and (3) only
B. (1) and (3) only
D. (1), (2) and (3)
B. (1) and (2) only
(1), (2) and (3)
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