S3 BIOLOGY

CONFIDENTIAL* Class : ………..…….…..

Name : …………………………………………………
I.C Number : ……………………………........…………

KOLEJ TINGKATAN ENAM SHAH ALAM
JALAN TIMUN 24/1

SHAH ALAM SELANGOR DARUL EHSAN

PROGRAM PENINGKATAN PRESTASI SEMASA PKPB 2020

BIOLOGY 964/3

PAPER 3
DURATION 1 HOUR 30 MINUTES

DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO

Write your name, I.C number and class in the
spaces provided.

There are 15 questions in Section A. For each
question, four choices of answers are given.
Choose one correct answer and indicate it on
the Multiple-choice Answer sheet provided.
Answer all questions.

Answer all questions in Section B. Write your
answers in the spaces provided.

Answer any two questions in Section C. Write
your answer on your examination test pad. All
working should be shown. Numerical answers
should be given to an appropriate number of
significant figures; units should be quoted
wherever appropriate. Begin each answer on a
fresh sheet of paper and arrange your answers
in numerical order.

This question paper consists of 7 printed pages

964/3 [Turn over]
*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

1

CONFIDENTIAL*

Section A [15 marks]
Answer all questions in this section.

1. A group of students found a species of animal with the following characteristics:

• Triploblastic coelom body
• Soft-body
• Body divided into head-foot and visceral mass region
• Mantle secretes the shell

Which of the following phylum does this animal most probably belong to?

A. Platyhelminthes B. Cnidarian C. Mollusca D. Arthropods

2. Which of the followings are true about the biotic components of an ecosystem?

I. The energy in each trophic level remains the same.
II. Autotrophs are always located in the first trophic level.
III. Carnivores are located in the third trophic level and above.
IV. The number of producers is always larger than primary consumers.

A. I and II B. I and IV C. II and III D. III and IV

3. Phosphate-rich rock Animals
Soil AD

BC
Plants

The diagram above shows a part of phosphorus cycle.
Which process A, B, C and D shows decomposition?

4. When a group of scientists reached an isolated Island, they were amazed to find out that a small group of

birds living in that island showed different beak shape from the rest of the birds in the mainland. They

believed that the birds were blown to the island due to strong wind during monsoon season hundreds of

years ago.

Which of the following speciation process has occurred?

A. Reproductive isolation C. Hybridisation

B. Genetic drift D. Adaptive radiation

5. The genotype of a human zygote will differ from that of both parents. Which of the following does NOT
contributes to this variation?
A. Mutation of genes
B. Presence of dominant genes
C. Random assortment of chromosomes
D. Crossing-over occurring during meiosis

964/3 [Turn over]
*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

2

CONFIDENTIAL*

6. Which of the following has evolved mainly as a result of artificial selection?
A. Increased resistance of black rats Rattus rattus to anti-coagulant poisons.
B. Increased resistance of houseflies Musco domestica to the insecticide DDT.
C. Darker colouring of the peppered moth Biston betularia near industrial areas.
D. Increased production and quality of the durian Durio zibethinus by the farmers.

7. The biochemical analysis of a DNA sample shows that 28% of the nitrogenous bases are guanine. What

is the total percentage of adenine and uracil in mRNA transcribed from the DNA?

A. 22% B. 28% C. 44% D. 56%

8. Which ecosystem has the pyramid of biomass as shown below?

Primary consumers
Producer

A. Desert B. Temperate forest C. Aquatic D. Tropical rain forest

9. The main stages of human insulin production by genetic engineering techniques are given:
1 – DNA cut with restriction enzymes
2 – mRNA extracted from pancreatic cells
3 – DNA copy made using reverse transcriptase
4 – recombinant plasmid transformed into bacteria
5 – DNA spliced into plasmid to form recombinant plasmid

Which sequence is correct?

A. 2 → 3 → 1 → 5 → 4
B. 2 → 1 → 3 → 5 → 4
C. 3 → 2 → 1 → 4 → 5
D. 3 → 2 → 4 → 1 → 5

10. Which of the following demonstrates stabilising selection?
A. Giraffes with long neck tend to survive during long drought season
B. Babies born with the average weight tend to show a higher survival rate
C. Female guppy fish tends to select the male fish with bright and colourful tail
D. Small-sized and big-sized bird`s beak are easier to survive as they have different food resources

11. What may happen to the lac operon if mutation occurs to the regulatory gene?
I. RNA polymerase cannot bind to the promoter.
II. Structural genes undergo transcription and translation.

III. Enzymes produce by the operon cannot function normally.
IV. The repressor protein produced cannot bind to the operator.

A. I and II B. I and III C. II and IV D. III and IV

964/3 [Turn over]
*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

3

CONFIDENTIAL*

12. The relationship between two types of organisms X and Y are shown in the graphs below.

Which statements are true about the graphs?
I Competition occurs between organism X and organism Y
II Organism Y is a prey to organism X
III Organism Y is a predator to organism X
IV The population growth is affected by density-dependent factors

A. I and III B. I and IV C. II and III D. II and IV

13. Potato crops in Ireland were devastated in 1845- 1847 by potato blight. During this period, more than
20% of the people died of starvation and 2 % moved to other countries. Which statement explains probable
population changes during this period?

A Mortality and emigration were equal to natality and immigration.
B Mortality and natality were equal to emigration and immigration.
C Mortality and imigration were greater than natality and emmigration.
D Mortality and emmigration were greater than natality and imigration.

14. A quadrate with the measurement of 50 cm x 50 cm is used to determine the density of a plant species.
The following data is obtained.

Quadrate 1 2 3 4 5 6 7 8 9 10

Number of plants 5 7 3 1 0 2 4 0 10 8

What is the density of the plant per meter square?

A. 4 B. 8 C. 16 D. 24

15. Which of the following is not a characteristic of a transgenic organism?
A. It has desirable and improved characteristics.
B. It is an organism that requires a foreign gene in its body.
C. It can carry out gene expression of the foreign gene normally.
D. it is engineered for the benefit of humans in agriculture and medical field.

964/3 [Turn over]
*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

4

CONFIDENTIAL*

Section B [15 marks]
Answer all questions in this section.
16. The diagram below shows the phosphorus cycle.

(a) Name the processes W, X, Y and Z [2 marks]

W: ……………………………….
X: ………………………………
Y: ………………………………
Z: ……………………………….

(b) Give three examples of biological molecules in the cells that contain the phosphate absorbed by the

plants through the roots. [3 marks]

……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………

(c) State two groups of organisms involved in the decomposition of phosphate in dead organisms and

release it as soluble phosphate. [2 marks]

……………………………………………………………………………………………………………………

……………………………………………………………………………………………………………………

(d) State how the consumers such as carnivores obtain their phosphate. [1 mark]

….……………………………………………………………………………………………………………….

…………………………………………………………………………………………………………………..

964/3 [Turn over]
*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

5

CONFIDENTIAL*

17. Three types of survivorship curves X, Y and Z are shown in diagram below

(a) What is meant by survivorship? [1 mark]

……………………………………………………………………………………………………………………

……………………………………………………………………………………………………………………

(b) State and explain the survivorship curves of X, Y and Z. [3 marks]

Survivorship curve type Explanation
X

Y

Z

(c) Give one example of organism representing the survivorship curve of X [1 mark]

………………………………………………………………………………………………………

(d) State two density- independent factors that could affect the size population [2 marks]
………………………………………………………………………………………………

………………………………………………………………………………………………

964/3 [Turn over]
*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

6

CONFIDENTIAL*

Section C [30 marks] [5 marks]
Answer any two questions in this section. [10 marks]

18. (a) Differentiate the cDNA library and Genomic Library
(b) Describe the benefits of application in Biotechnology for agriculture and medicine

19. (a) Suggest some positive actions which could be taken to conserve biodiversity in Malaysia [5 marks]

(b) Explain how human activities may bring harms to the environment [5 marks]

(c) Differentiate the adaptive features of organism using K-strategy and r-strategy for their survival
[5 marks]

20. (a) Explain the factors that limiting the population size and distribution. [9 marks]
(b) Compare the characteristics of phylum Coniferophyta and phylum Angiospermatophyta [6 marks]

-End of questions-

964/3 [Turn over]
*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

7