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Biology questions
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1. An athlete has just finished a race. The phrase "oxygen debt " refers to

the amount of oxygen originally present in the muscles of the athlete before the race
the amount of oxygen taken in after the race and used to complete the combustion of some of the lactic acid
the total amount oxygen taken in during panting after the race
the amount of oxygen needed by the lungs after the race for combustion of glucose

2. Which one of the following is not an important function of the liver?

detoxification of poison
regulation of cholesterol production
storage of amino acid
storage of vitamin and mineral salts

3. Which one of the following is not an adaptation to facilitate gaseous exchange in organisms?

increased surface area of organs involved
decrease in thickness of exchange surface
increased body size of organism
increase in concentration gradient

4. Which one of the following does not cause increase in human body temperature?

constriction of peripheral blood vessels
shivering of muscles
increased metabolic rate
dilation of deep lying blood vessels

5. In the process of blood clotting, thrombin acts as an enzyme to bring about conversion of

fibrinogen to fibrin
fibrin to fibrinogen
prothrombin to thrombokinase
thrombokinase to prothrombin

6. The saprophytic and holoizoic modes of feeding are similar because both

do not feed on cellulose
do not require chloroplast
utilize enzymes to break down complex food substances
feed only on dead organic matter

7. Which one of the following causes variation which is always inherited?

mutation
radiation
geographical position
environmental factor

8. The following belong to the same group of organisms except

trypanosoma
penicillium
plasmodium
entamoeba histolytica

9. If a specie has 24 chromosomes in each somatic cell, how many chromosomes will a sperm cell contain?

6
12
24
48

10. The cichlidae fish family (small fish ) occupy various areas in lake Victoria, lake Edwards and lake George. They feed on weeds and insects. Some lay eggs at lake bottoms, others on sand shores and rocky banks. This is a good example of

adaptive radiation in the species
colonization of land
succession in the lake
fish behavior

11. Which of the following presents the diameter of a silt particles?

2 - 0.2
0.2 - 0.02
0.02 - 0.002
less than 0.002

12. In peas, the gene for tallness (T) is dominant over that of shortness (t). If peas of different genotypes were crossed and all offsprings appeared tall, what would be the genotype of the parental peas?

Tt × Tt
tt × tt
TT × tt
TT × TT

13. Which of the following is true of an atlas vertebra?

it has a prominent neural spine
has a short neural spine
the neutral canal is very large
the centrum is modified into odontoid process

14. The femur is connected to the pelvic girdle of a human by

cartilage
synovial fluid
ligaments
ball and socket joint

15. Which fins in fish are used for creating the current of water to facilitate breathing while the fish is stationary ?

dorsal fins
pectoral fins
pelvic fins
caudal fins

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