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Bilolgy questions with wll explained answers

MULTIPLE CHOICE BIOLOGY QUESTIONS WITH ANSWERS

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1. Which one of the following statements correctly describes the transcription of DNA?
It produces amino acids
It results in an increased DNA synthesis
It produces messanger RNA
It occurs at the surface of the ribosome

2. Which one of tge following events occurs during telophase of mitosis in the meristematic cells of a root tip?
Cleavage of the cytoplasm
Replication of the centrioles
Replication of the chromosome
Formation of the cell plate

3. The following are mmetabolic processes
(i)synthesis of plasma protein
(ii)regulation of fat metabolism
(iii)storage of vitamin A
(iv)manufacture of digestive enzymes
Which of these are functions of the liver?
(i), (ii) and (iii)
(i), (ii) and (iv)
(i), (ii) and (iv)
(ii), (iii) and (iv)

4. What happens to most of the reduced NADH2 molecules in cell metabolism?
Direct use in the synthesis of starcfrom glucose
Oxidation in mitochondrial ATP formation
Oxidation in the Calvin Cycle
Combination with sulpheric acid as part of the Krebs cycle

5. Which base sequence below will pair with AGU ?
TGC
TCA
GCC
ATT

6. Which one of the following would cause phenotypic variation among organisms of the same genotype?
Exposure to different environments
Continouse variation within the species
Different sexes
Mutation

7. The phylogenetic approach to classification is used because it groups together all animals that show
Analogous structures
Homologous structures
Convergent evolution
Adaptive radiation

8. Which one of the following sequences correctly represents the action of notifying bacteria?
Ammonium -> nitrite -> nitrate
Ammonium -> nitrate ->nitrite
Nitrite -> ammonium -> nitrate
Nitrite ->. nitrate -> ammonium

9. Which one of the following would speed up the phosphorylation of hexose sugar?
A decrease in ADP concentration
A decrease in the concentration of APT
An increase in concentration of phosphorylase
An increase in the concentration of phosphorylated hexosees

10. Changes in the level of carbon dioxide mammalian blood is detected by
Carotid and aortic bodies
Medulla oblongata
Cardio-vascular center
Hypothalamus

11. Which one of the following may be a result of inbreeding ?
Improved fertility
Accumulation of lethal genes
Polyploidy
Increased mutation rate

11. Which one of the following is the main function of the Golgi apparatus in the living cell?
Destruction of worn out cells organelles
Synthesis of cell wall components
Synthesis of protein
Intracellular transport

13.Which of the following methods is most suitable for establishing the population of the paramecium in a pond ?
Capture-recapture method
Total count
Removal sampling
Random sampling

14. Which of the following pairs of proteins is found in skeletal muscle ?
Actin and myosin
Keratin and actin
Myosin and fibrogen
Myosin and collagen

15. The physiological important of the hair-pin counter multiplier system in mammalian kidney is to ensure that
Much water is excreted out through the kidney
Much water is reabsorbed
Glucose in not lost in urine
All urea is excreted in urine

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You might want to check Biology question set 007 Biology question set 005 1. It is known that a lactating mother may suffer from the weakning of teeth and bone. Which vitamin and minerals would she need to correct this condition ?
vitamin K, iodine and phosphorus
vitamin C, phosphorus and calcium
vitamin A, calcium and iron
vitamin D, phosphorus and calcium

2. The organism in a food chain that releases materials for re-use by green plants is called
decomposer
secondary consumer
primary consumer
primary producer

3. Green plants produce less carbon dioxide during the day because
the rate of respiration is low during the day
some of the carbon dioxide produced is used up internally for photosynthesis
transpiration interfere with carbon dioxide evolution by leaves
most stomata close due to strong heat during the day

4. Which one of the following is the correct order of arrangement from the smallest to the largest group of organisms?
species, orde, genus, class, phylum
species, class, order genus, phylum
species, class, order, phylum, genus
species, genus, order, class, phylum

5. Which of the following methods would best determine the rate of growth of a seedling?
length of radicle and fresh weight
diameter of radicle and dry weight
length of radicle and dry weight
diameter of radicle and fresh weight

6. What would happen if a ligament broke?
muscles would be detached from bone
muscle pull would result
there would be dislocation of bones during movement
synovial fluid would leak out from a synovial membrane

7. Which of these characters is an example of continous variation in man?
skin colour
albinism
dwafism
blood group

8. The element that is essential for the formation of both plant cell wall and bone in animals is
iron
calcium
phosphorus
sulphur

9. In favorable conditions, yeast reproduce by
fragmentation
conjugation
sporulation
budding

10. Which one of the following protozoa has cilia?
amoeba
euglena
paramecium
plasmodium

11. The kidneys purify blood by
ultra filtration
absorption and filtration
selective absorption and filtration
ultra filtration and selective re-absorption

12. Which vessel empties fat into the right atrium of the mammalian heart?
posterior vena cava
anterior vena cava
palmonary vein
palmonary artery

13. Which one of these insects does not lay eggs in its life cycle?
bee
grasshopper
tsetse fly
house fly

14. Which one of these is not a mean of movement in protozoa?
coeclom
flagella
cilia
pseudopodia

15. The type of soil with minute airspaces and high water retention capacity is
sand
clay
silt
loam

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