MID-YEAR EXAMINATION 2012FORM 5

SCIENCE (1511/1)1 HOUR 15 MINUTES

NAME:……………………………………………… FORM:………………

PREPARED BY: CHECKED BY: AUTHORIZED BY…………………………… ………………………….. ……………………….

Guru Sains Ketua Panitia Sains Guru Kanan Sains & Matematik

This paper consists of 50 questions. Answer all questions.Each questions is followed by four alternative answers, A, B,C and D. For each question, choose one answer only.

1. In meiosis, variation is caused by A replication C cytokinesis B movement of chromatids to the poles D crossing over

2. Diagram 2 shows the formation of a zygote.

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What is the chromosome in cell P?A 22+X B 22+Y C 44+XX D 44+XY

3. Diagram 3 shows the production of offspring in human.

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Sel P22 + X 44 + XY

Zygote

Zigot

Diagram 2

46 46

Male Female

Parents

Gametes

Offspring

23 23

P

Q

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Diagram 3

What is process P and Q? P QA Mitosis fertilisationB Fertilisation mitosisC Fertilisation meiosisD Meiosis fertilisation

4. Which inherited disease is suffered by an individual that has 3 chromosomes at the 21st pair? A Hemofilia C Colour blindness

B Down’s Syndrome D Sickle cell anaemia

5. Diagram 4 shows the different phases in cell division during mitosis.

Which of the following shows the correct sequences of mitosis?A R, T, S, U B T, R, U, S C S, T, R, U D S, R, U, T

6. Diagram 5 shows the inheritance of height of pea plants.

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R S

T U

Diagram 4

Parents

Induk

First generation

Generasi pertama

Tall plant

Pokok tinggi

Tall plant

Pokok tinggi

Diagram 5

T represents the dominant genes for tall.

t represents recessive genes for short.

What are the genes for the parents?A Tt x Tt B TT x tt C Tt x tt D TT x TT

7. Which of the following statements shows the advantage of genetic research?A Cloning of humansB Improve the quality and yield of agriculture and livestock product.C Produces dangerous animals that threaten other living organismsD Use of biological weapon

8. Fetus that develops into a baby boy or a girl is determined by the A sex chromosomes of the ovum B sex chromosomes of the sperm C number of sex chromosome of the ovum D number of sex chromosome of the sperm

9. Which of the following human characteristics is controlled by resessive gene? A Curly hair C Free ear lobes B Blue eyes D The ability to roll tongue 10. Diagram below shows a tall garden pea plant which is cross-bred with a dwarf garden pea plant.

What percentage of their offspring in the first generation is tall?A 25% C 75%B 50% D 100%

11. Why is mitosis important to human? A To produce gametes B To determine the gender of the baby C To produce new variations in humans D To produce new cells to replace old or damaged cells

12. Which of the following about chromosomes is not true? A Chromosomes exist in pairs in the nucleus. B Chromosomes consist of protein and nucleic acid. C The number of chromosomes in each body cell of an organism is different. D Chromosomes contain genes that carry information about inheritance.

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13. Genetic research in agriculture produce plants with certain desire characteristics. Which of the following is not a desired characteristics? A Mature faster B Produce more fruits C Produce more quality fruits D Has short life span

14. The proton number and nucleon number of an atom X is 12 and 25 respectively. It means that atom X has A 12 electron C 12 neutrons B 13 electrons D 13 protons

15. A mixture of ethanol and water can be separated by A. filtration. B. evaporation C. Distillation D. crystallization

16. What are properties represented by an element from left to right of the Periodic Table I the number of protons increases. II the metallic properties increases. III the elements change from solid to gas

A. I, and II only B. I, and III only C. II, and III only D. I, II, and III

17.

Diagram above shows a Periodic Table. What are elements x, y and z ? A. a non-metal, a transition metal and a inert gas. B. a non-metal, a non-transition metal and a inert gas. C. a non-transition metal, a transition metal and a non-metal. D. a non-transition metal, a transition metal and a inert gas.

18. Diagram below shows the change in the states of ice cubes.

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During the change of state,A the particles release energy

B the water molecules become bigger C the water molecules become less dense D the forces of attraction between particles weaken

19. Substance P has a melting point of -15°C and a boiling point of 87°C. What is the physical condition of substance P at room temperature? A Solid C Solid + liquid B Liquid D Gas

20. What is meant by the nucleon number? A The number of protons and the number of neutrons B The number of neutrons C The number of protons D The number of electrons and protons

21. Which of the following statements about isotopes is true? I The atoms have the same proton number II The atoms have different nucleon numbers III The name of the atoms are the same

A. I, and II only B. I, and III only C. II, and III only D. I, II, and III

22. Which of the following is not a chemical change? A. Evaporation B. Photosynthesis C. Rusting of iron D. Neutralisation

23. A chemical reaction I is usually irreversible. II does not involve energy change. III results in formation of new products.

A. I, and II only B. I, and III only C. II, and III only D. I, II, and III

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24. Which of the following is a physical change? A. Photosynthesis B. Melting of ice C. Reaction of metal and oxygen D. Heating of zinc carbonate

25.

Diagram above shows an experiment to study the heat change in a chemical reaction. What is this reaction? A. Exothermic B. Endothermic C. Neutralization D. Decomposition

26. What type of battery is used in calculator? A. Alkaline battery B. Acid-lead battery C. Nickel-cadmium battery D. Silver oxide battery

27. The process of producing ammonia is known as the… A Contact process B Haber process C Ostwald process D reducing process

28. Which of the following are endothermic reaction? I Melting II Heating III Neutralisation

A. I, and II only B. I, and III only C. II, and III only D. I, II, and III

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29. Which of the following metals reacts more vigorously with oxygen? A Zinc C Magnesium B Copper D Aluminium

30. Which of the following is the smallest unicellular microorganism? A. Algae B. Virus C. Protozoa D. Bacteria

31. In which of the following ranges of temperature, are the microorganisms mosst active? A 0°C - 10°C C 70°C - 80°C B 30°C - 40°C D 100°C - 110°C

32. Which of the following statements explains that food kept in a refrigerator can retain its freshness? A. The growth rate of microorganisms decreases B. Microorganisms live actively at low temperatures C. All microorganisms are killed at low temperatures D. Microorganisms grow and reproduce well in the refrigerator

33. Mun Yee wants to make doughnut. Which of the following microorganisms can she use? A Yeast C Algae B Mucor D Bacteria

34. Which disease is spread through water? A AIDS C Pneumonia B Cholera D Tuberculosis

35. The spread of diseases can prevented by sterilisation. Which of the following is not a method sterilisation? A Heat C Radiations B Chemicals D Magnetism

36. The ability of our body to fight against diseases is known as A immunity C vaccination B antiseptics D sterilisation

37. Which of the following is the best way to prevent the spread of diseases through contact? A Improve the sanitary system B Prevent vectors from breeding C Avoid sharing towels or clothes D Drink boiled water and eat cooked food

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38. X is used to act on soya beans. Soy sauce is produced. What is X? A Fungi C Bacteria B Virus D Protozoa

39. Mosquitoes are vectors for… I dengue II AIDS III malaria

A I and II only C II and III only B I and III only D I, II and III

40. One of the function of food is to supply energy. Which of the following food contain the highest calorie per unit gram?

A Margarine C Fish B Milk D Bread

41. The diagram shows cholesterol deposit in the human artery.

Cholesterol deposit A is caused by excessive intake of unsaturated fats B interferes with blood flow through the artery C can be broken down through the hydrolysis process D causes diabetes

42. What is the most important substance needed for the formation of teeth, bones and red blood cells in an infant? A Carbohydrates C Fat B Phosphorus D Protein

43. Table below shows the calorific values for carbohydrate, protein and fat.Class of food Calorific value (kJ/g)Carbohydrate 16.7

Protein 22.2Fat 37.6

A packet of biscuits contains 34g of carbohydrates, 5g of proteins and 3g of fats. Calculate the total calorific value of the biscuits.A 386.9 kJ C 791.6 kJB 580.3 kJ D 928.4 kJ

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44. Which factor does not affect the calorie requirement of an individual?A Race

B State of health C Physical activities D Surrounding temperature

45. What is a balanced diet?A A diet which contains a lot of fibre

B A diet rich in protein and carbohydrate C A diet which contains all the nutrients needed by a healthy body D A diet which contains all the food classes in the correct proportions

46. Which disease is caused by the deficiency of protein?A Gout C KwashiorkorB Obesity D Anorexia nervosa

47. The information below shows the effect of deficiency of nutrient X.

What is nutrient X?A Copper C PhosphorusB Nitrogen D Molybdenum

48. Individuals living in cold climate regions need food which is rich in fat A to increase the growth rate B to prevent deficiency ddisease C to replace the heat lost to the surrounding D to provide energy for muscular contraction

49. Diagram below shows part of the nitrogen cycle.

Name the bacteria involved in processes P and Q.P Q

A Nitrifying bacteria Nitrogen-fixing bacteriaB Denitrifying bacteria DecomposerC Decomposer Nitrogen-fixing bacteriaD Decomposer Nitrifying bacteria

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Yellowing of leaves due to lack of chlorophyll This condition is called chlorosis

50. Which of the following is not a healthy eating habit?A Eat moderately

B Chew food slowly C Eat at regular times D Eat plenty of junk food

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