4551/1

Biology (KSSM) Name:

August 2023
1hr 15mins Class:

SRI UCSI SCHOOL

SUBANG JAYA

MID-YEAR EXAMINATION 2023

Form 4

Paper 1

Duration : 1 Hour 15 Minutes

KSSM Biology 4551/1

DO NOT OPEN THIS QUESTION PAPER UNTIL YOU ARE TOLD TO DO SO

INSTRUCTIONS:

1. This question paper consists of 11 pages.

2. Answer all questions.

3. Total marks are 40 marks.

4. The diagrams in these questions provided are not drawn to scale unless stated.

5. Hand in your answer sheet at the end of the examination.

4551/1 CONFIDENTIAL
 SECTION A
(40 Marks)

1. Which field is related to the study of body structure of organisms ?

A Anatomy C Botany
B Histology D Embryology

2. Your friend has accidentally injured himself in the laboratory. What should you do first
in the situation ?
A Apply first aid to him
B Bring him to see a doctor after school
C Inform your teacher or lab assistant
D Bring him out from the laboratory

3. Which of the following cannot be disposed into the sink ?

I Distilled water
II Salt solution
III Hydrogen peroxide
IV Rubber
A I and II C III and IV
B II and III D I and IV

4. What is the best anatomical term to describe the back region of the body ?
A Ventral C Dorsal
B Lateral D Proximal

5.
A variable that is systematically
changed to produce observation

What is the variable that best described in the statement above ?

A Responding variable C Manipulated variable
B Constant variable D Dependent variable

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6. Diagram 1 shows a plant cell.

A
B

Diagram 1
Which of the labelled parts is also found in the animal cells ?

7. Diagram 2 shows an animal cell.

Diagram 2
What is organelle X ?
A Nucleus C Golgi apparatus
B Smooth endoplasmic reticulum D Rough endoplasmic reticulum

8. Which of the following shows the correct structure and the corresponding function of a
root hair cell ?
Structure Function
A No cell wall Water transport
B No nucleus Increase volume
C Long projection Increase surface area
D Numerous Golgi apparatus Secretion of cell sap

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9. Diagram 3 shows a unicellular organism.

Diagram 3
What is the function of X?
A Osmoregulation C Respiration
B Feeding D Growth

10. Which of the followings are organs that can be found in respiratory system ?
A Ovary C Heart
B Kidney D Lungs

11. Which of the following statement outlines the difference between active transport and
facilitated diffusion ?
Active transport Facilitated diffusion
A Occurs through transport protein Occurs through phospholipid bilayer
B Does not require energy Require energy
C Movement of substances against Movement of substances follows
concentration gradient concentration gradient
D Involves non-polar molecules Involves polar molecules

12. Which of the following molecule will most probably diffuse the fastest through water ?
A Methanol C Propanol
B Ethanol D Butanol

13. A gardener planted an herbaceous plant in a pot with soil taken from the mangrove
swamp. After a few days he found that the plant wilted. What is the cause of the wilting
of the plant ?
A Less aeration in the soil
B Too much fertiliser in the soil

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 C The soil water is hypertonic to the root cells
D Too little soil in the pot

14. Diagram 4 shows a graph of percentage difference in length of strips of potato against
concentration of sucrose solution.

Diagram 4
At which point A, B, C or D is the concentration of the sucrose solution is hypertonic to
the cell sap of the potato cells ?

15. Four potato strips are placed in distilled water and three salt solutions of different sal
concentration. The percentage changes in mass of the potato strips after four hours are
shown below. Which potato strip was most likely to be placed in distilled water
Potato strip Percentage change in mass
A P +5 %
B Q +10 %
C R 0%
D S - 15 %

16 The following statement are about the properties of water

I A large amount of energy is needed to change its temperature by 1°C
II It is a good solvent.
III It removes heat from the surface from which it evaporates
Which of the properties listed explain why water is suitable to be used to regulate body
temperature ?
A I and II only C I and III only
B II and III only D I, II and III

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17. Table 1 shows the elements which are present in two classes of food, P and Q.
Chemical Compounds Elements

P C, H, O

Q C, H, O, N

Table 1

What chemical compound are P and Q ?

P Q
A Carbohydrates Lipids
B Lipids Carbohydrates
C Carbohydrates Proteins
D Proteins Lipids

18 Which of the following elements is required by plants for manufacturing amino acids ?
A Nitrogen C Phosphorus
B Magnesium D Manganese

19. Which of the following is a feature of saturated fats that make them different from
unsaturated fats ?
A They have no C-C double bonds in their structure
B They have a lower melting point
C They can be more easily broken down by lipase
D They exist as liquids in room temperature

20 Which of the following organic compounds and its function are correctly matched ?
Compound Function
A Proteins Provides energy
B Carbohydrates Repair damaged tissue
C Nucleic acids Stores genetic informations
D Lipids Solvent for non-fat soluble vitamins

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21 Which of the following shows the difference between anabolism and catabolism ?
Anabolism Catabolism
A Break down of complex molecule Synthesis of complex molecules
B Require energy Release energy
C Occurs only in plant Occurs only in animal
D Breakdown glucose during cellular Form glucose during photosynthesis
respiration

22 Which of the following statement about the characteristics of enzymes is true ?

A Enzymes are not affected by condition such as pH and temperature
B Enzymes are very specific in their reaction
C Enzymes are needed in large quantity
D Enzymes cannot be reused after a chemical reaction

23 Which of the following is not affected by enzymes ?

A Digestion C Photosynthesis
B Blood clotting D Breathing

24. Diagram 5 shows the broken of a complex molecule by an enzyme.

Diagram 5
Which of the molecules A, B, C or D represents the enzyme ?

25. Diagram 6 shows how temperature may affect an enzyme-catalysed reaction.

Diagram 6

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 Which of the following statements is true ?
A At M, the rate of reaction is very low as the enzymes is denatured
B At N, the concentration of enzyme is the highest
C At O, enzyme-substrate complexes are still formed
D At P, the charges on active site of enzyme are altered

26. Diagram 7 shows a graph of the optimum pH of enzyme activity.

Diagram 7
Which curves A, B, C or D represent the activity of salivary amylase ?

27. Which are the most suitable enzyme and temperature to clear a blood stain on a shirt ?
Enzyme Temperature
A Lipase 37°C
B Protease 18°C
C Lipase 18°C
D Protease 37°C

28. What happens during S phase of the cell cycle ?

A Synthesis of protein and new organelles

B Replication of DNA
C Cell prepares to divide
D Cell growth

29. Diagram 8 shows four phases involved in mitosis which takes place in a somatic cell
with chromosomal number 4.

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 Diagram 8
Which of the following is the correct sequence of the phases ?
A I, II, III, IV
B III, IV, I, II
C I, III, II, IV
D IV, I, III, II

30. What are the end products of mitosis ?

A Two identical diploid cells
B Four identical diploid cells
C Two unique haploid cells
D Four unique haploid cells

31. Which of the following process does not involve mitosis ?

A Repair of damaged skin tissue
B Growth of muscles
C Production of sperm cells
D Production of white blood cells

32. Which of the following shows the chromosome number of cells in various parts of a
flowering plant ?

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 Anther Pollen Stem
A Diploid Diploid Haploid
B Diploid Haploid Diploid
C Haploid Diploid Diploid
D Diploid Haploid Diploid

33 Which of the following can occur as a result of uncontrolled mitosis ?

I Leukemia
II Malignant tumors
III Thalassemia
IV Haemophilia
A I and II C III and IV
B II and III D I and IV

34 Which of the following is not true about Down’s syndrome ?

A There is an error in spindle fibre formation in the meiosis of cells that give
rises to the gamete
B There is an extra X chromosome in a person suffering from Down’s syndrome
C A person suffering from Down’s syndrome is physically and mentally
retarded
D A person suffering from Down’s syndrome has 47 chromosomes

35 What is the main substrate of cellular respiration ?

A Fats C Sucrose
B Glucose D Lipid

36 What is the function of cellular respiration ?

A To produce carbon dioxide for cell

B To produce energy for the cell
C To increase the concentration of glucose in the cell
D To produce lactic acid for the cell

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37. Diagram 9 shows an equation for aerobic respiration.

Diagram 9
What are V and W ?
V W
A Glucose Carbon dioxide
B Energy Glucose
C Carbon dioxide Water
D Glucose Oxygen

38 Which of the following takes place during strenuous exercise ?

I Aerobic respiration
II Lactic acid fermentation
III Glycogen production
IV Alcohol fermentation
A I and II C III and IV
B II and III D I and IV

39. Which of the following comparisons between aerobic respiration and fermentation in
human muscle is correct ?
Aerobic respiration Fermentation
A No oxygen is consumed Oxygen is consumed
B Large amount of ATP is produced Small amount of ATP is produced
C Lactic acid is produced Ethanol is produced
D Glucose is oxidised No glucose is oxidised

40 What happens in the muscle tissues during vigorous activity ?

A Glucose molecules break down partially into ethanol
B Glucose molecules break down completely into lactic acid
C Glucose molecules break down completely to produce carbon dioxide
D Glucose molecules break down incompletely to produce 150kJ of energy

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 - END OF QUESTIONS -

Prepared by, Checked by, Verified by,

________________ ________________ _________________

Ms. Arina Syairah Ms. Tee Swee Lee Mrs. Tan
Subject teacher Head of Division Principal

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