Biology – Past Questions

Biology

2006 POST UME SCREENING TEST

1. An amoeba moving towards a crumb of cake in a pond most likely exhibits
(a) phototropism
(b) chemotaxis
(c) thermotaxis
(d) nastic movement

2. Which of the following cells would most probably contain the greatest number of Golgi bodies
(a) muscle cell
(b) secretor cell
(c) nerve cell
(d) white blood cell

3. A group of similar cells performing the same function is
(a) an enzyme
(b) an organ
(c) a tissue
(d) an organelle

4. Structures founding cells are listed below:
i) cell wall ii) cell membrane iii) chloroplast iv) cytoplasm v) nucleus vi) sap vacuole
Which of these structures are found in both animal cells and plant cells?
(a) i, ii and v
(b) i, iii and v
(c) ii, iii and v
(d) ii, iv and v

5. Which of the following is not present in the nucleus of a cell?
(a) chromosomes
(b) nucleolus
(c) mitochondrion
(d) genes

6. A plant which grows on another plant without apparent harm to the host plant is
(a) a parasite
(c) saprophyte
(b) epiphyte
(d) a predator

7. The petals of a flower are collectively called
(a) calyx
(c) carpel
(b) capsule
(d) corolla

8. Osmosis can be defined as diffusion of
(a) water molecules from an area of high concentration to an area of low concentration.
(b) water molecules from a dilute solution to a concentrated solution across a permeable membrane
(c) water molecules from a concentrated solution to a dilute solution through a semi permeable membrane.
(d) water molecules from a dilute solution to a concentrated solution through a semi-permeable membrane.

9. The oxygen given off during the process in the above equation ( 6CO2 + 6H2O --------> 6C6H12O6 + 6O2 ) is derived from
(a) sunlight
(b) water
(c) carbon dioxide
(d) atmosphere

10. When testing a leaf for starch, why is it first placed in boiling water?
(a) to extract the chlorophyll
(b) to remove colour from the leaf
(c) to dissolve the starch
(d) to stop chemical reactions

11. Each of the following is an arthropod except the
(a) crab
(b) scorpion
(c) spider
(d) snail

12. The largest phylum in the animal kingdom is
(a) Cnidaria
(b) Mollusca
(c) Chordate
(d) Arthropoda

13. With reference to the figure above, which of these are correct?
a. I and II are proglottides and hooks
b. I and III are rostellum and suckers
c. III and IV are hooks and proglittides
d. II and IV are hooks and rostellum

14. The two species of human tapeworm can be distinguished by the presence or absence of
(a) scolex
(b) hook
(c) head
(d) sucker

15. The ventricles of the mammalian heart are more muscular than the auricles because the
(a) auricles have smaller capacity
(b) ventricles are larger in size
(c) ventricles pump blood to distant organs
(d) ventricles receive more blood

16. Which of the following statement is not correct about the function of each group of mammalian vertebrate?
a. caudal viiebrae support the tail and provide attachment for tail muscles
b. thoracic vertebrae articulate with the ribs
c. lumber vertebrae provide attachment for abdominal muscles.
d. sacral vertebrae support the skull and allow nodding and rotating of movement

17. In the adult toad, gaseous exchange takes place through
(a) Buccal, skin and spiracle
(b) buccal cavity, bladder and lungs
(c) buccal cavity, skin and lungs
(d) gills, skin and buccal cavity

18. The foot of the bird shown below is strong and has strong claws on its digits. This implies that the bird
(a) is a scavenger
(b)is a bird of prey
(c) uses the foot to supplement wing action
(d) uses the foot to scratch the soil

19. Which of the following is not a means of conservation?
a. replacing harvested mature timber trees with their seedlings
b. prevention of poaching
c. controlling excessive deforestation
d. burning of vegetation before cropping

20. One of the following statements is not true of viruses
(a) they are micro-organisms (b) they are smaller than bacteria
(c) they can be seen with an ordinary light microscope
(d) they cause tobacco disease, polio and smallpox

21. The brain and the spinal cord constitute the
(a) autonomic nervous system
(b) sympathetic nervous system
(c) somatic nervous system
(d) central nervous system

22. Which of the following parts of the mammalian brain is involved in taking the decision to run rather than walk?
(a) cerebellum
(b) medulla oblongata
(c) midbrain
(d) cerebrum

23. Which part of the ear is responsible for the maintenance of balance?
(a) cochlea
(b) tympanic membrane
(c) Eustachian tube
(d) semi-circular canals






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