POST UTME BOWEN UNIVERSITY 2018 Biology | Objective

Are you preparing for POST UTME BOWEN UNIVERSITY 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.

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Question 1
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
Correct A. 0.64
B. 0.36
C. 0.48
D. 0.16

Correct Answer: A

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Question 2
The diagram below shows the structure of a plant cell. Which part is responsible for photosynthesis?
A. Vacuole
Correct B. Chloroplast
C. Cell Wall
D. Cytoplasm

Correct Answer: B

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Question 3
The nervous system of an organism is responsible for transmitting signals from the sense organs to the brain. Which of the following is NOT a type of sense organ?
A. Eye
B. Ear
C. Nose
Correct D. Skin

Correct Answer: D

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Question 4
The xylem in a plant is responsible for transporting water and minerals from the roots to the leaves. Which of the following is a type of xylem cell?
Correct A. Tracheid
B. Vessel
C. Fibroblast
D. Parenchyma

Correct Answer: A

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Question 5
The diagram below shows the structure of a neuron. Which part is responsible for transmitting signals to other neurons?
Correct A. Axon
B. D\endrite
C. Cell Body
D. Myelin Sheath

Correct Answer: A

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Question 6
In the context of evolutionary theories, what is the primary mechanism by which genetic drift leads to the fixation of a deleterious mutation?
A. Genetic hitchhiking
B. Bottleneck effect
C. Mutation accumulation
Correct D. Genetic drift

Correct Answer: D

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Question 7
A plant cell is placed in a solution containing 0.1 M glu\cose. If the cell membrane is permeable to glu\cose, what will be the concentration of glu\cose inside the cell after 10 minutes?
Correct A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M

Correct Answer: A

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Question 8
A 2.0 L flask contains 1.0 mol of an ideal gas at 298 K. If the gas is allowed to expand to 4.0 L at cons\tant temperature, what is the new pressure?
A. 1.0 atm
Correct B. 2.0 atm
C. 3.0 atm
D. 4.0 atm

Correct Answer: B

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Question 9
A population of 1000 individuals is growing \logistically with a carrying capacity of 2000. If the initial growth rate is 0.2 per year, what is the population size after 10 years?
A. 1200
B. 1500
Correct C. 1800
D. 2000

Correct Answer: C

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Question 10
A 0.1 M solution of a weak acid (HA) is 10% dissociated at equilibrium. If 0.1 M NaOH is added to the solution, what is the new pH?
A. 2.0
Correct B. 3.0
C. 4.0
D. 5.0

Correct Answer: B

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Question 11
In a photosynthetic pathway, which enzyme catalyzes the conversion of ribulose-1,5-bisphosphate to 3-phosphoglycerate?
Correct A. Ribulose-1,5-bisphosphate carboxylase/oxygenase
B. Phosphoglycerate kinase
C. Phosphoglycerate mutase
D. Triosephosphate isomerase

Correct Answer: A

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Question 12
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?
A. The cell will shrink due to water loss
Correct B. The cell will swell due to water uptake
C. The cell will remain unchanged
D. The cell will burst due to osmotic pressure

Correct Answer: B

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Question 13
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
Correct D. Lens

Correct Answer: D

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Question 14
A diagram of the human kidney is shown below. Which part of the kidney is responsible for filtering waste from the blood?
Correct A. Renal cortex
B. Renal medulla
C. Renal pelvis
D. Ureter

Correct Answer: A

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Question 15
A diagram of the human brain is shown below. Which part of the brain is responsible for controlling movement?
A. Cerebrum
B. Cerebellum
Correct C. Brainstem
D. Spinal cord

Correct Answer: C

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Question 16
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
Correct A. Storage of water and minerals
B. Transport of sugars and amino acids
C. Production of ethylene gas
D. Maintenance of turgor pressure

Correct Answer: A

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Question 17
Which of the following microorganisms is responsible for the production of botulinum toxin?
A. Escherichia coli
B. Staphylococcus aureus
Correct C. Clostridium botulinum
D. Bacillus cereus

Correct Answer: C

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Question 18
In the classification of living things, what is the primary characteristic that distinguishes between prokaryotes and eukaryotes?
Correct A. Presence of a true nucleus
B. Presence of mitochondria
C. Presence of a cell wall
D. Presence of a plasma membrane

Correct Answer: A

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Question 19
In the reproductive cycle of a plant, what is the primary function of the sporophyte generation?
A. Production of gametes
Correct B. Production of spores
C. Production of seeds
D. Production of fruits

Correct Answer: B

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Question 20
In the process of respiration, what is the primary function of the mitochondria?
Correct A. Production of ATP
B. Production of NADH
C. Production of FADH2
D. Production of water

Correct Answer: A

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Question 21
The process of genetic drift in a population can be influenced by the following factors except:
A. Genetic variation
B. Genetic mutation
C. Genetic recombination
Correct D. Genetic drift

Correct Answer: D

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Question 22
The diagram below shows the structure of a plant cell. Which of the following organelles is responsible for photosynthesis?
A. Mitochondria
Correct B. Chloroplast
C. Vacuole
D. Nucleus

Correct Answer: B

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Question 23
The diagram below shows the structure of a human eye. Which of the following parts is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 24
The process of digestion in the human body involves the breakdown of food into smaller molecules. Which of the following enzymes is responsible for breaking down proteins?
A. Amylase
B. Lipase
Correct C. Tryp\sin
D. Lactase

Correct Answer: C

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Question 25
The diagram below shows the structure of a neuron. Which of the following parts is responsible for transmitting signals?
A. D\endrite
B. Axon
Correct C. Synapse
D. Cell body

Correct Answer: C

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