UTME 2021 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 2021 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
One of the functions of the xylem is
Correct A. strengthening the stem
B. manufacturing food
C. reducing loss of water
D. conducting manufactured food

Correct Answer: A

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Question 2
Which of the statements below is not characteristic of wind pollinated flowers?
A. Stigmas are usually large and feathery
B. Nectary is usually absent
Correct C. The pollen grains have rough spiny surfaces
D. The flowers are not scented.

Correct Answer: C

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Question 3
Some of the features of an animal are scales, teeth, nares and backbone. The animal is likely to be a
A. toad
B. bird
Correct C. lizard
D. rat

Correct Answer: C

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Question 4
Choose the sequence which represents the correct order of organisms in a food chain.
A. Grass, snake, toad, grasshopper, hawk
Correct B. Grass, grasshopper, toad, snake, hawk
C. Grass, grasshopper, snake, toad, hawk
D. Grass, snake, grasshopper, toad, hawk.

Correct Answer: B

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Question 5
Flatworms and roundworms are said to be invertebrates because
A. they are small animals
B. they can live inside the vertebrates
C. some of them are unicellular
Correct D. they have no backbones.

Correct Answer: D

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Question 6
When a Spirogyra cell is immersed in a salt solution more concentrated than its cell sap, it
A. remains unchanged
B. takes up water and burst
C. absorbs a little water
Correct D. loses water and shrivels.

Correct Answer: D

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Question 7
Which of the following is NOT regarded as a pollutant on land or in the air?
A. Smoke
Correct B. Nitrogen
C. Noise
D. Sulphur dioxide

Correct Answer: B

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Question 8
The initial volume of water poured into a bag of dry soil was 50 ml and the amount that drained through was 35 ml. The percentage water content of the fully soaked soil is therefore
A. 46.7
B. 25.0
C. 20.0
Correct D. 30.0

Correct Answer: D

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Question 9
When the original king and queen of termites die, they are replaced by
A. the king and queen of another colony
B. some adult reproductives from the same colony
C. some adult workers which are specially fed to breed
Correct D. developing nymphs nurtured as secondary reproductives.

Correct Answer: D

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Question 10
In demonstrating the importance of mineral elements in plants, the culture bottle must be darkened to
Correct A. prevent algal growth in culture solution
B. allow root growth
C. prevent breakdown of mineral elements
D. prevent photosynthesis in the root.

Correct Answer: A

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Question 11
In the mammalian respiratory system, exchange of gases occurs in the
A. lungs
B. bronchi
C. bronchioles
Correct D. alveoli.

Correct Answer: D

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Question 12
Aged erythrocytes are destroyed in the
A. pancreas
Correct B. liver
C. lymph nodes
D. kidney.

Correct Answer: B

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Question 13
The villus in the small intestine is significant because it
Correct A. increases the surface area for absorption
B. increases the surface area for digestion
C. assists in mixing digested food
D. assists in filtering undigested food.

Correct Answer: A

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Question 14
Which of the following food substances will produce a brick-red colour when warmed with Benedict's solution?
Correct A. Glucose
B. Starch
C. Egg white
D. Maltose

Correct Answer: A

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Question 15
The blood vessel which carries blood from the alimentary canal to the liver is the
A. hepatic artery
B. hepatic vein
Correct C. hepatic portal vein
D. mesenteric artery.

Correct Answer: C

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Question 16
Which of the following is TRUE of the process of conjugation in Paramecium?
A. Micronucleus disintegrates
B. Each ex-conjugant divides only once
C. Macronucleus undergoes division
Correct D. Each micronucleus divides twice.

Correct Answer: D

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Question 17
People who suck petrol with their mouths run the risk of increasing in their blood the concentration of
A. iron
Correct B. lead
C. calcium
D. magnesium

Correct Answer: B

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Question 18
Which of the following is a measure for the control of bilharzia?
A. Cutting low bushes around homes
Correct B. Application of molluscicides in water bodies
C. Screening windows and doors with mosquito nets
D. Application of herbicides in water bodies.

Correct Answer: B

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Question 19
The appendicular skeleton is composed of the pectoral girdle
Correct A. pelvic girdle, fore and hind limbs
B. pelvic girdle and fore limbs
C. lumbar vertebrae and pelvic girdle
D. lumbar vertebrae, fore and hind limbs.

Correct Answer: A

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Question 20
A freshwater plant such as water lily can solve the problem of buoyancy by the possession of
Correct A. aerenchymatous tissues
B. dissected leaves
C. thin cell walls of the epidermis
D. water-repelling epidermis.

Correct Answer: A

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Question 21
The correct sequence for the perception of smell in mammals is
A. chemicals → olfactory nerve endings → brain
B. dissolved chemicals → nasal sensory cells → brain
C. chemicals → mucus membrane sensory cells → brain
Correct D. dissolved chemicals → sensory cells → olfactory nerve → brain.

Correct Answer: D

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Question 22
I. High birth rate and high immigration rate II. Low birth rate and high immigration rate III. Low mortality rate and low emigration rate IV. High mortality rate and high emigration rate. Which combination of the above can cause rapid overcrowding in climax biotic communities and human settlements?
A. II and III
Correct B. I and III
C. I and IV
D. I and II.

Correct Answer: B

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Question 23
The number of plant species obtained from a population study of a garden is as follows: Guinea grass (15), Ipomea spp (5), Sida spp (7) and Imperata spp (23). What is the percentage of occurrence of Imperata spp?
A. \( \frac{35}{100} \)
B. \( \frac{16}{100} \)
Correct C. \( \frac{46}{100} \)
D. \( \frac{23}{100} \)

Correct Answer: C

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Question 24
When a marine fish was taken from the ocean and put in a tank of fresh water, it died after a short period because
A. the tank was too small compared to the large ocean
Correct B. the body cells of the fish swelled and burst as a result of the hypotonic fresh water
C. the body cells of the fish shrank as their sap was hypertonic to the fresh water
D. there was no food in the tank, so the fish starved.

Correct Answer: B

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Question 25
If a DNA strand has a base sequence TCA, its complementary strand must be
A. ATG
B. TAG
C. GAT
Correct D. AGT

Correct Answer: D

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