POST UTME UNILAG 2018 Biology | Objective

Are you preparing for POST UTME UNILAG exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2018 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the
A. S phase
B. G1 phase
C. G2 phase
Correct D. Interphase

Correct Answer: D

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Question 2
The xylem is responsible for transporting water and minerals from the roots to the leaves of a plant. Which of the following is NOT a type of xylem cell?
A. Tracheids
B. Xylem parenchyma
C. Fibers
Correct D. Collenchyma

Correct Answer: D

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Question 3
The process of osmoregulation in animals involves the regulation of the concentration of solutes in the body fluids. Which of the following is a mechanism of osmoregulation?
Correct A. Excretion of excess water
B. Ingestion of salt
C. Excretion of excess salt
D. Ingestion of water

Correct Answer: A

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Question 4
The nervous system is responsible for transmitting signals between different parts of the body. Which of the following is a type of neuron?
A. Motor neuron
B. Sensory neuron
Correct C. Interneuron
D. Glia cell

Correct Answer: C

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Question 5
The classification of living things is based on their morpho\logy, physio\logy, and biochemistry. Which of the following is a characteristic of prokaryotic cells?
A. Presence of a true nucleus
B. Presence of mitochondria
C. Presence of a cell wall
Correct D. Absence of a true nucleus

Correct Answer: D

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Question 6
In a eukaryotic cell, the process of osmoregulation is primarily facilitated by the
Correct A. plasma membrane
B. mitochondria
C. \endoplasmic reticulum
D. lysosome

Correct Answer: A

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Question 7
The rate of photosynthesis is influenced by the
A. temperature
B. light intensity
C. concentration of CO2
Correct D. all of the above

Correct Answer: D

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Question 8
The process of digestion in the small intestine is facilitated by the
A. pancreatic juice
B. bile
C. gastric juice
Correct D. all of the above

Correct Answer: D

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Question 9
The theory of evolution by natural selection was proposed by
Correct A. Charles Darwin
B. Gregor M\endel
C. Jean-Baptiste Lamarck
D. Alfred Russel Wallace

Correct Answer: A

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Question 10
The process of excretion in the kidney is primarily facilitated by the
Correct A. glomerulus
B. renal pelvis
C. ureter
D. collecting duct

Correct Answer: A

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Question 11
In a tropical rainforest e\cosystem, the primary producers are plants that undergo photosynthesis. What is the net result of photosynthesis in terms of oxygen and glu\cose production?
A. Oxygen is produced and glu\cose is consumed.
B. Oxygen is consumed and glu\cose is produced.
Correct C. Oxygen is produced and glu\cose is produced.
D. Oxygen is consumed and glu\cose is consumed.

Correct Answer: C

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Question 12
A species of bird has a unique mating ritual where the male bird builds a complex nest u\sing twigs and leaves. What type of reproduction is this an example of?
A. Asexual reproduction
Correct B. Sexual reproduction
C. Parthenogenesis
D. Binary fission

Correct Answer: B

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Question 13
In a desert e\cosystem, the primary consumers are insects that feed on the primary producers. What is the role of these insects in the e\cosystem?
A. They are the primary producers.
Correct B. They are the secondary consumers.
C. They are the decomposers.
D. They are the scavengers.

Correct Answer: B

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Question 14
A species of fish has a unique adaptation where it can change its body color to bl\end in with its surroundings. What is the name of this adaptation?
Correct A. Camouflage
B. Mimicry
C. Cryptic behavior
D. Apophenia

Correct Answer: A

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Question 15
In a coral reef e\cosystem, the coral polyps are the primary producers. What is the role of the coral polyps in the e\cosystem?
A. They are the primary consumers.
Correct B. They are the secondary producers.
C. They are the decomposers.
D. They are the scavengers.

Correct Answer: B

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Question 16
In the context of photosynthesis, what is the role of the enzyme RuBisCO in the Calvin cycle?
Correct A. It catalyzes the conversion of CO2 to a 3-carbon molecule.
B. It is involved in the light-dep\endent reactions.
C. It is a key enzyme in the breakdown of starch.
D. It is responsible for the reduction of NADP+ to NADPH.

Correct Answer: A

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Question 17
A patient with a genetic disorder has a mutation in the HBB gene. Which of the following is a possible consequence of this mutation?
Correct A. Sickle cell anemia
B. Thalassemia
C. Hemophilia
D. Leukemia

Correct Answer: A

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Question 18
A diagram of the human eye is shown below. Which of the following is the correct label for the part labeled 'A'?
Correct A. Cornea
B. Iris
C. Retina
D. Lens

Correct Answer: A

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Question 19
A population of rabbits is growing exponentially. If the initial population is 100 and the growth rate is 20% per year, what will be the population after 5 years?
A. 1000
B. 2000
C. 4000
Correct D. 8000

Correct Answer: D

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Question 20
A diagram of the human skeletal system is shown below. Which of the following is the correct label for the part labeled 'B'?
A. Sternum
Correct B. Vertebrae
C. Ribs
D. Pelvis

Correct Answer: B

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Question 21
In the context of evolutionary bio\logy, what is the primary mechanism driving the adaptation of populations to their environments?
Correct A. Natural Selection
B. Genetic Drift
C. Gene Flow
D. Mutation

Correct Answer: A

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Question 22
A species of bird has a beak shape that is well-suited for cracking open seeds. However, a genetic mutation causes some individuals to have a beak shape that is better suited for eating insects. What is the likely outcome for the population?
Correct A. The population will adapt to the new beak shape and become better suited for eating insects.
B. The population will remain the same and continue to eat seeds.
C. The population will decline due to the loss of the original beak shape.
D. The population will adapt to the new beak shape and become better suited for eating seeds.

Correct Answer: A

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Question 23
In a population of rabbits, the frequency of the dominant allele for fur color is 0.6. What is the frequency of the recessive allele?
A. 0.2
Correct B. 0.4
C. 0.6
D. 0.8

Correct Answer: B

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Question 24
A species of plant has a life cycle that includes both asexual and sexual reproduction. What is the primary advantage of asexual reproduction?
A. Increased genetic variation
Correct B. Faster reproduction
C. Reduced energy exp\enditure
D. Improved adaptation to environment

Correct Answer: B

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Question 25
In a population of bacteria, the frequency of the dominant allele for antibiotic resis\tance is 0.8. What is the frequency of the recessive allele?
A. 0.2
Correct B. 0.4
C. 0.6
D. 0.8

Correct Answer: B

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