Science Form 4 Exam Question

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MID YEAR EXAMINATION SMK SCIENCE FORM 4 Objective Questions

1. What What is the the basic basic unit unit in the the nervous nervous syst system? em? A Axon B Nucleus C Neurone D Dendrite

7. The figure shows the the male endocrine system. Which of the following glands A, B, C and D is the pituitary gland?

2. What What is the the funct function ion of of the the myeli myelin n sheath sheath ? A Transmits im impulses to to th the ce cell bo body B Trans ansmits impulses from the cell body C Speeds up the tr transmission of of impul pulses D Contr ntrols ols al all the the activities in in th the ne neuro urone 3. Sensory Sensory cells cells which can detect detect stimuli stimuli are called called A Neuronea B Effectors C Receptors D Cell bodies 4. Involu Involunta ntary ry acti actions ons are are control controlled led by by the A Cerebrum B Cerebellum C Spinal Cord D Medulla Ob Oblongata 5. Which Which of the follow following ing statem statement entss is not true about hormones? A Horm ormones ar are se secreted by by en endocrine gl glands B Horm ormones ar are ca carried by by blo blood to to al all pa parts of the body. C Horm ormones func unction by cont ontrolling and regulating body activities. D Each hor horm mone ha has only one target organ. 6. What What is the functi function on of thyrox thyroxine ine ? A Controls the menstrual cycle B Stimulates the development of Male secondary sexual characteristics C Contr ntrols ols the rate of metabolism in in the body D Prepares the body ody for acti ctions duri uring an emergency

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8. Undersecretion of insulin will cause A Goitre B Dwarfism C Gigantism D Diabetes mellitus 9. The following are effects of drug d rug abuse except A Causing hulluinations. B Activating the nervous system. C Slowing down nerve impulses. D Increasing sensitivity to stimuli. 10.Proprioceptors are receptors which are sensitive to A Light B Sound C Smells D Movements

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11. Excessive consumption of alcohol will cause I brain damage better judgement II III cirrhosis of the liver A B C D

I and II only I and III only II and III only I, II and III

12. The factors which can affect the state of mind are drug abuse I II hormonal imbalance III excessive consumption of Alcohol A B C D

15. The diagram shows a first generation of cross breeding of two cats.


13. The diagram shows the different phases in cell division in mitosis.

H h

represents th the do dominant genes for black fur represents re recessive genes for white fur

What are the genes for the parents? Male Female A HH Hh B HH hh C Hh hh D hh Hh 16. The diagram shows how the sex offspring is determined in humans.

Which is the correct sequence in the mitosis? A P,Q,R,S B Q,R,P,S C R,S,Q,P D S,P,R,Q 14. A mouse’s mouse’s somatic somatic cell cell contain containss 40 chormosomes. How many chromosomes are found in its ovum?

Which chromosomes are found in gametes P and Q?





17. Which of the following processes involve mitosis? I Formation of gametes II Development of embryos III Asexual reproduction A B C D


18. The figure shows the inheritance of height of pea plants.

21. Meiosis is important for I replacing wo worn-out cells II producing reproductive cells III causing va variation am among Individuals A B C D

22. The sex of a baby is determined by I the sex chromosome of the sperm II the sex chromosome of the ovum III the number of sex chromosome A B C D

Which offspring has a correct pair of genes? Offspring Pair of genes A P Tt B Q TT C R TT D S tt 19. The chromosomes present in the male skin cells are A B C D

22 + Y 22 + X 44 + XX 44 + XY

20. Ali and Ahmad are identical twins. Ali is brought up in Malaysia. Ahmad is brought up in England by his foster parents. They may be different in


I only II only I and III only I, II and III

23. Which of the following statements are true about identical twins? I They result from the fertilization of an ovum by a sperm. II They must be of the same sex. III They carry the same genetic information A B C D


24. A female who has only one X chromosome is said to suffer from





25. Colour-blindness is a genetic disorder caused by A a chromosome mutation B the presence of 3 sex chromosomes C the presence of an extra chromosome 21. D a recessive gene in the X Chromosome 26. Which of the following genetic disorders are caused by chromosome mutations? I Down’s syndrome II Turner’s syndrome III Klinefelter’s syndrome A B C D


27. Selective breeding is carried out on crops to produce plants which I are more resistant to diseases II bear more fruits III prod produc ucee fruit uits of bet better ter qual qualiities ties A B C D

30. The figure shows the breeding of two different type of papaya.

The breeding of these papayas is to produce A plenty of papaya R B sweeter papaya R C a papaya R tree that bears fruit earlier D a papaya R tree that is resistant to disease 31. The diagram shows the structure of a human brain. Which of the parts A, B, C and D control the body equilibrium?


28. Which of the following characteristics is affected by environmetal factors? A Body weight B Blood group C The ability to roll the tongue D Type of ear lobes 29. Which of the following is an example of a discontinuous variation? A Height

32. Which of the following the correct sequences of the mitosis stages?





33. The diagram shows the inheritance of height in a type of plant.

What is the ratio of the number of tall young plants To the number of dwarf young plants in the filial generation? A B C D

1:0 1:1 1:3 3:1

37. The figure shows a process that occurs during cell division.

The process refers to A mitosis B mutation C cross-over D fertilization 38. The figure shows the chromosomes found in the cells of a human body suffering from a genetic disease.

34.Which of the following is an example of a continuous variation? A Height B Blood group C Type of ear lobe D Ability to roll the tongue 35. Which of the following statements is correct about meiosis? A Involves all types of of cells B Involved in growth C Halves the number of chromosomes D Genet netic con conttents of daugh ughter ce cells and Parent cells are similar 36. Which of the following shows the correct number of autosomes and the correct type of sex chromosomes in a baby girl?

Which chromosome pair causes the diseases? A 1 B 6





39. The graph shows an example of variation among the students in a class.

43. Based on the periodic table, which element represent a metal?

Another example of the same type of variation is A type of hair B body weight C blood group D type of ear lobes

44. Which of the following is not stated in the kinetic theory of matter? A Matter is made up of tiny particles. B The particles of matter are in constant motion. 40. Harris Harris picks some some tomatoes. tomatoes. What What type of of action action C When atoms combine is this? chemically, molecules are A A reflex action formed. B A capillary action D When temperature rises, the C A voluntary action particles of matter obtain D An involuntary action more kinetic energy and move faster. 41. Based on on the table, table, which which elements elements are isotopes? isotopes?

A B C D

E and G G and J J and L E and L

42. When When water water change changess into into ice, ice, A heat eat is absorbed bed from the surround unding B its molecu ecules lo lose thei heir kin kinetic en energy

45. Which of the following statements about the characteristics of subatomic particles is not true? A Neutron is neutral in terms of charges. B Proton is the nucleus of an atom. C The mass of the neutron is so small that it is negligible. D Electrons surrounds the nucleus in paths called orbits. 46. Which of the the following following statements statements is not true about solid particles? A The particles are closely







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Science Form 4 Exam Question

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