UTME 2023 Biology | Objective

Are you preparing for UTME exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2023 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
A potometer with a leafy shoot weighed 18.9 g initially and 17.9 g after 1 hour. From this it follows that
A. the shoot absorbed 1 g of water per hour
B. 1 g of water per hour evaporates from the potometer
Correct C. the shoot lost 1 g of water per hour
D. the potometer water receded at the rate of 1 g per hour.

Correct Answer: C

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Question 2
Alkaline pyrogallol was used in an experiment. That experiment must have been connected with
A. excretion
Correct B. germination
C. transpiration
D. photosynthesis.

Correct Answer: B

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Question 3
The filaments of Spirogyra were put into equal volumes of sugar solutions X and Y. After 5 minutes, filaments from solution X had their cell contents rounded up while those from Y were unaffected. The experiment shows that
Correct A. solution X was stronger than Y
B. solution Y was stronger than X.
C. Spirogyra used up the sugar in solution X
D. solution X is good for stimulating sexual reproduction in Spirogyra.

Correct Answer: A

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Question 4
The rate of transpiration of a leafy shoot would be highest under
A. damp, cold, still air
B. damp, warm, moving air
Correct C. dry, warm, moving air
D. dry, cold, moving air.

Correct Answer: C

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Question 5
If a 26 year old blind man married a young one-eyed woman and they had four children, how many of them would be blind like their father?
A. All
Correct B. None
C. 3
D. 2

Correct Answer: B

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Question 6
28 g soil sample was heated to a constant weight of 24 g. When further heated to red hot and cooled, it weighed 18 g. What is the percentage of humus in the soil?
Correct A. 22.2
B. 55.6
C. 75.0
D. 25.0

Correct Answer: A

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Question 7
The removal of a man's pancreas by surgical operation can affect only the digestion of
A. starch
Correct B. starch, protein and fats
C. oils and fats
D. proteins.

Correct Answer: B

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Question 8
Movements and positions of the head in man are detected by the
A. cochlea
B. malleus
C. utriculus
Correct D. semicircular canals.

Correct Answer: D

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Question 9
Samples of different soil types are packed in glass tubes whose lower ends are plugged with cotton wool, if these tubes are suspended in a trough of water, water will rise highest after a few hours in
A. sand
B. loam
Correct C. clay
D. humus.

Correct Answer: C

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Question 10
The flower shown above is
Correct A. complete, regular, hermaphroditic with superior ovary
B. incomplete, regular, hermaphroditic with inferior ovary
C. complete, regular, hermaphroditic with inferior ovary
D. incomplete, irregular, pistillate with superior ovary.

Correct Answer: A

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Question 11
If a dark-skinned woman (Bb) marries an albino man (bb) and they have four children, how many of the children will be dark-skinned?
A. 3
Correct B. 2
C. 1
D. 0

Correct Answer: B

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Question 12
A fundamental similarity between nervous and hormonal system is that both
Correct A. involve chemical transmission
B. have widespread effects
C. shed chemicals into the blood stream
D. evoke rapid responses.

Correct Answer: A

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Question 13
Excretory products responsible for the red, purple and blue colours of flowers are called
A. alkaloids
B. tannins
Correct C. anthocyanins
D. resins.

Correct Answer: C

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Question 14
Fertilizers are lost from the soil through
A. sheet erosion and evaporation
Correct B. leaching, underground seepages and run-off
C. sheet erosion, gully erosion and wind erosion
D. wind erosion and heavy rainfall.

Correct Answer: B

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Question 15
A major difference between platyhelminthes and coelenterates is that platyhelminthes
A. are multicellular
Correct B. have developed a mesoderm
C. reproduce sexually
D. reproduce asexually.

Correct Answer: B

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Question 16
When it is cold, the blood vessels of the skin
A. dilate to increase the amount of blood flowing to the skin
Correct B. constrict to reduce the amount of blood flowing to the skin
C. dilate to reduce the amount of blood flowing to the skin
D. constrict to increase the amount of blood flowing to the skin.

Correct Answer: B

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Question 17
The anatomical evidence usually used in support of the evolutionary relationship among whales, humans, birds, and dogs is the possession of
A. thick skin
Correct B. pentadactyl limb
C. tail
D. epidermal structures.

Correct Answer: B

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Question 18
Environmental pollutants which can work through the media of water, soil and air include
A. carbon monoxide
B. noise
Correct C. sulphur (IV) oxide
D. smoke.

Correct Answer: C

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Question 19
Long neck in giraffe is used to illustrate the theory of
A. use and disuse
B. origin of species
C. origin of life
Correct D. natural selection.

Correct Answer: D

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Question 20
The nucleus is considered the central organelle of a cell because it
Correct A. contains the genetic material
B. contains the cell sap
C. is bounded by the nuclear membrane
D. is located at the centre of the cell.

Correct Answer: A

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Question 21
Yellowing of leaves is a symptom associated with deficiency of
A. iron, calcium and magnesium
B. nitrogen, sulphur and potassium
C. sulphur, phosphorus and iron
Correct D. magnesium, nitrogen and iron.

Correct Answer: D

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Question 22
A certain savanna grasshopper changes colour from green during the rainy season to brown during the dry season and black after the dry season bush fires. The reason for these colour changes is that the
A. grasshopper is getting older
B. environmental temperature is changing
Correct C. grasshopper is avoiding predation
D. grasshopper is frequently moulting.

Correct Answer: C

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Question 23
Which of the following is likely to encourage inbreeding in plants?
A. Doccious
B. Protandrous
Correct C. Monoecious
D. Hermaphrodite.

Correct Answer: C

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Question 24
In a population study using the transect method, a student is likely to record the highest number of species in
Correct A. a tropical rain forest
B. a guinea savanna
C. a sahel savanna
D. an estuarine swamp.

Correct Answer: A

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Question 25
One example of fossil fuels is
A. limestone
B. coral
Correct C. coal
D. firewood.

Correct Answer: C

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