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BIOLOGY (Objective Questions And Answers)


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THEORY QUESTIONS
WAEC SYLLABUS

WASSCE 2012

Objectives



​1. The science of life is referred to as

A. Anatomy

B. Biology

C. Ecology

D. Phylogeny


2. The epidermis of a leaf is considered an example of a tissue because the cells

A. Allow sunlight to pass through

B. Are covered by a waxy cuticle

C. All possess a similar structure and function

D. Allow water to enter them by osmosis


3. The organism at the organ level of organisation of life is

A. Euglena

B. Spirogyra

C. Ginger

D. Tapeworm


4. The disadvantage of complexity of organisation in the higher organisms is that it leads to

A. mutual interdependence between component cells

B. internal structural specialization

C. increased adaptation to environment

D. slower rate of diffusion of oxygen to individual cells


5. In which of the following multicellular organisms is interdependence of cells maintained?

A. Spirogyra

B. Volvox

C. Eudorina

D. Pandorina


ANSWERS

6. Which of the following processes occurs in the second phase of meiosis? .

A. Homologous chromosomes separate

B. Two daughter cell are formed

C. Fertilization occurs

D. Segregation of genes occurs


7. The muscle cell fluid of an athlete was tested immediately after a 100 m race and was found to contain a high concentration of lactic acid, explain what could have caused this. This

A. Athlete must have eaten food containing lactic acid just before the race.

B. Athlete must have injected lactic acid into his blood just before the race.

C. Athlete s muscle must have carried out anaerobic respiration during the race

D. athlete must have inhaled lactic acid from the environment during the race


8. The graph below represents the growth pattern of an animal. Which of the following groups of animals shows this pattern of growth?





A. Cestoda

B. Reptilia

C. Amphibia

D. Insecta


9. The pulmonary circulation involves movement of the blood to and from the

A. brain

B. kidneys

C. liver

D. lungs


The table below shows the blood composition of four individuals. Use the information contained in the table to answer questions 10 and 11.





10. Which of the individuals is likely to be suffering from haemophilia?

A. I

B. ll

C. Ill

D. IV


ANSWERS

​11. Which of the individuals is likely to have HIV?

A. I

B. II

C. III

D. IV


12. A student dissecting an animal specimen discovered that it had two auricles and one ventricle. The animals is likely to be a/an

A. Fish

B. Reptile

C. Amphibian

D. Bird







13. The diagrams above are parts of a human lung. Which of the labeled pants is diagrams Z taken from?

A. II

B. III

C. IV

D. VI





14. The diagram above is an illustration of the human excretory system. Which of the labelled parts contains the highest amount of nitrogenous waste?

A. I

B. ll

C. IV

D. VI


15. Increasing adrenaline content of the blood would be expected to decrease the flow of blood to the

A. liver

B. heart

C. lungs

D. brain


ANSWERS

16. The following are all examples of a simple reflex action, except

A. swallowing

B. sneezing

C. walking

D. blinkin


17. Impulses are conducted towards the nerve cell through the

A. Myelin sheath

B. Dendrons

C. Axons

D. Synaptic nodes.


18. The function of the convex lens in the correction of eye defects is to

A. Diverge light rays from far objects to focus image on the retina

B. Converge light rays to focus image behind the retina

C. Converge light rays to focus the image before the retina

D. converge light rays from far objects to focus their image the relina.


19. Which of the following parts of the eye contains light sensitive cells?

A. Choroid

B. Iris

C. Retina

D. Lens


20. The hair on the human skin will stand erect when the person

A. In an air-conditioned room

B. Strolling in the sun.

C. Taking a hot drink.

D. Doing strenuous exercise


ANSWERS

​21. When fertilization occurs that leads to formation of a zygote, which of the following processes takes place?

A. The tail of the sperm fuses with the egg cell

B. Both tail and head of the sperm fuse with the egg cell

C. The nucleus of the sperm fuses with the egg cell

D. The egg cell develops oh its own without the sperm


22. Which of the following structures in a flower develops into seed?

A. Testa

B. Integument

C. Ovule

D. Ovary





23 An illustration of a human male reproductive system i shown above. Which of the labelled parts can be cut to ensure permanent sterility

A. I

B. II

C. Ill

D. l


24. The brightly coloured petals in some plants is an adaptive colouration for

A. Feeding

B. Pollination

C. Dispersal

D. Shedding


25. Squirrels easily U some trees because

A. They inject poisonous substances into the trees

B. Most trees are susceptible to squirrel bites

C. They feed veraciously on the roots

D. They gnaw the bark and destroy phloem


ANSWERS

26. The major role played by accessory pigments during photosynthesis is to

A. Add colour to plants but not to

B. Trap light energy that

C. Transfer energy from prevent chlorophyll from

D. Prevent chlorophyII from absorbing unnecessary


27. The main raw materials required for photosynthesis are

A. Oxygen and water

B. Oxygen and carbon dioxide.

C. Oxygen and chlorophyll

D Carbon dioxide and water.


28. That is the benefit of thunder and lightning to farmers?

A. Addition of nitrates to the soil

B. Aeration of the soil

C. Removal of harmful bacteria from the soil

D. Addition of rain water to the soil


29. Which of the following substances must be present in the soil for growth of a healthy green plant?

A. Amino acids

B. Carbon

C. Glucose salts

D. Magnesium ions


30. The purpose of proteins in the diet of a mammal is to

A. Promote growth and repair cells

B. Break down molecules

C. Regulate the flow of chyme

D. Serve as co-factors for enzymes.


ANSWERS

​31. Excess carbohydrates can be stored in the muscles in the form of

A. cellulose

B. glycogen

C. chitin

D. lipids.


32. The bones of the legs of a six year old boy are observed to be weak and crooked. Which of the following elements were deficient in his mother's diet at pregnancy?

A. Sodium and iron

B. Iron and manganese

C. Calcium and phosphorus

D. Magnesium and sulphur





33. The diagram above is an illustration of an experimental set-up to test the action of yeast. What test would be used to confirm the nature of the gas given off at I?

A. Insert a glowing splint

B. Pass the gas through lime water

C. Insert a piece of litmus paper

D. Smell the gas


34. Which of the following digestive enzymes would be greatly affected if the liver fails to produce bile?

A. Amylase

B. Cellulase

C. Lipase

D. Protease





35. The appropriate food to be given to the child in the picture above is

A. Beans

B. Garri.

C. Bread.

D. Avocado pear


ANSWERS

36. Which of the following food substances will have little or no calorific value?

A. Proteins

B. Carbohydrates

C. Lipids

D. Water


37. A space containing a group of interactive organisms is called

A. Community

B. Habitat

C. Ecosystem

D. Population.


38. The area around the earth where life activities go on is referred to as

A. Biosphere

B. Lithosphere

C. Habitat

D. Ecosystem.


39. The following are abiotic components of the ecosystem except

A. Bacteria

B. Topography

C. Water

D. Wind.


40. Which of the following instruments would be most appropriate in comparing the air pressure at different places in a habitat?

A. Hygrometer

B. Barometer

C. Photometer

D. Air pressure disc


ANSWERS

​Study the diagram below and use it to answer question 41 and 42





41. The best title for the above diagram is

A. Terrestrial food web

B. Terrestrial food chain

C. Aquatic food web

D. Aquatic food chain


42. How many food chains are in the diagram?

A. Three

B. Four

C. Five

D. Six


43. Plants with breathing roots are characteristic features of vegetation in

A. Tropical grassland

B. Temperate grassland

C. Salt water swamp

D. Tropical rain forest.


Study the diagram of the zones of a marine habitat below and use it to answer questions 44 and 45.





44. In which of the zones can very few organisms be found?

A. I

B.ll

C. Ill

D. IV


45. Which of the following factors exerts a major effect on the distribution of living organisms in the habitat?

A. Salt

B. pH

C. Light

D. Rainfall


ANSWERS

46. The use of water closet and septic tanks is preferred to the use of bucket and pit latrines because

A. It is cost effective

B. Contaminated faces are completely kept away from flies

C. The water for flushing contains chlorine which kills the germs

D. It prevents flies from breeding.


47. The detection of vibro cholerae in public drinking water is a sign of

A. Clean water.

B. Outbreak of disease

C. Water pollution

D. Decayed organisms in the water


48. Which of the following factors would be least likely to act as a density dependent limiting factor in a population of mice?

A. Build up of waste products

B. Predation

C. Parasitism

D. Unfavourable climate


49. The primary cause of species endangerment is

A. Disappearing habitats

B. Increase in temperatures

C. Acid rain

D. Exposure to hazardous wastes


50. The following pairs of traits are examples of continuous and discontinuous variations respectively except

A. Eye colour and body weight

B. Height and blood group

C. Skin colour and fingerprints

D. Body weight and tongue rolling.


ANSWERS

​51 .Which of the following statements is true about the ABO blood group system?

A. Antigens are located on the surface of white blood cells

B. Antibodies are located in the blood plasma

C. Antibodies are located on the surface of red blood cells

D. Antigens are located in the blood plasma


52. The classes of fingerprints in man are

A. Whorl, alternate, opposite and compound

B. Compound, loop, whorl and alternate

C. Whorl, arch, compound and loop

D. Arch, simple, compound and opposite.


53. Which of the following diseases is transmittable through genes?

A. HIV/AIDS

B. Sickle cell anaemia

C. Diabetes

D. Presbyopia


54. Two plants with red flowers were back crossed, which of the following results indicate that the plants are heterozygous red flowers, where red flowers are dominant?

A. 75% red and 25% white

B. 50% red and 50% while

C. 100% white -

D. 100% red


55. In the structure of DNA, which of the following statements is true?

A. The double helix are held together by covalent bonds

B. Nucleotide is made up of ribose, phosphate and an organic nitrogen compound

C. Guanine is the opposite of cytosine

D. Adenine is the opposite of cytosine


ANSWERS

56. In a case of complete dominance, what is the phenotypic ratio of the cross Bb X Bb where B = black and b = white?

A. 1 black : 1 grey : 2 whites

B. 1 black: 3 whites

C. 1 black : 2 blues : 1 white

D. 3 blacks : 1 white


57. Two yellow - flowered hybrid plants each carrying a recessive factor for flowers with green colour were crossed. Which of the following ratios shows the correct proportion of offspring that have green flowers?

A. 2 in 2

B. I in 3

C. 1 in 4

D. 1 in 5


58. What name is given to a sudden change in a gene or chromosome?

A. Allele

B. Genotype

C. Mutation

D. Phenotype


59. Bees are of great importance to the farmer because they

A. Provide him with honey

B. Pollinate flowers

C. Sting crop pests to death

D. Destroy flowers by sucking nectar from them.


60. Which of the following sequences is the correct evolutionary trend in plants?

A. Algae Liverworts Mosses Ferns

B. Liverworts Mosses Ferns Algae

C. mosses Algae Ferns Liverworts

D. Ferns liverworts Mosses Algae



WASSCE JUNE 2012 BIOLOGY OBJECTIVE TEST

ANSWERS

1. B 2. C 3. C 4. D 5. B 6. D 7. C 8. D 9. D 10. D

11. B 12. C 13. D 14. A 15. A 16. C 17. C 18. D 19. C 20. A

21. C 22. C 23. B 24. B 25. D 26. B 27. D 28. A 29. D 30. A

31. B 32. C 33. B 34. C 35. A 36. D 37. A 38. A 39. A 40. B

41. A 42. B 43. C 44. D 45. C 46. B 47. C 48. A 49. A 50. A

51. B 52. C 53. B 54. A 55. D 56. A 57. B 58. C 59. B 60. A


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