POST UTME BOWEN UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process by which an organism's genetic information is passed from one generation to the next is known as
A. Heritability
B. Inheri\tance
C. Mutation
D. Genetic Drift
Question 2
A plant is placed in a controlled environment with a cons\tant temperature and humidity. What is the primary factor that would affect the rate of photosynthesis?
A. Light intensity
B. Temperature
C. Humidity
D. CO2 concentration
Question 3
A 30-year-old woman presents with a 2-year history of recurrent episodes of abdominal pain, diarrhea, and weight loss. Her stool examination reveals the presence of a gram-negative rod. Which of the following is the most likely diagnosis?
A. Salmonellosis
B. Shigellosis
C. Campylobacteriosis
D. Escherichia coli
Question 4
The largest organ in the human body is the
A. Skin
B. Liver
C. Lungs
D. Heart
Question 5
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
A. To focus light on the retina
B. To detect changes in light intensity
C. To regulate the amount of light entering the eye
D. To produce tears
Question 6
In a photosynthetic pathway, which of the following electron carriers is responsible for the transfer of electrons from plastocyanin to the reaction center?
A. Ferredoxin
B. Plastocyanin
C. Cytochrome b6f
D. Pheophytin
Question 7
A 35-year-old female presents with a 6-month history of progressive memory loss and confusion. Her MRI scan shows a large mass in the temporal lobe. Which of the following is the most likely diagnosis?
A. Alzheimer's disease
B. Frontotemporal dementia
C. Huntington's disease
D. Amyotrophic lateral sclerosis
Question 8
In a tropical rainforest e\cosystem, the primary consumers are primarily composed of which of the following groups?
A. Herbivorous insects
B. Fruiting plants
C. Fungi
D. Decomposers
Question 9
A plant has a xylem vessel with a diameter of 100 μm. If the xylem vessel is 10 cm long, what is the total cross-sectional area of the xylem vessel?
A. 3.14 × 10^-4 cm^2
B. 3.14 × 10^-3 cm^2
C. 3.14 × 10^-2 cm^2
D. 3.14 × 10^-1 cm^2
Question 10
A cell has a surface area of 100 μm^2 and a volume of 1000 μm^3. What is the surface-to-volume ratio of the cell?
A. 1:100
B. 1:10
C. 1:1
D. 10:1
Question 11
In the context of excretion and osmoregulation, what is the primary function of the kidneys in regulating blood pressure?
A. To regulate the amount of water in the blood
B. To remove waste products from the blood
C. To regulate the amount of electrolytes in the blood
D. To regulate blood pressure through the renin-angioten\sin-aldosterone system
Question 12
A 10.0 mL sample of a solution is diluted to 100 mL. If the initial concentration is 0.1 M, what is the final concentration?
A. 0.01 M
B. 0.05 M
C. 0.1 M
D. 0.2 M
Question 13
In the context of hormonal coordination, what is the primary function of the hypothalamus in regulating body temperature?
A. To maintain a cons\tant body temperature through thermoregulation
B. To regulate the release of hormones that control appetite and satiety
C. To stimulate the release of hormones that control growth and development
D. To regulate the sleep-wake cycle
Question 14
A 28-year-old female presents with a 3-month history of progressive visual loss and double vision. Her MRI scan shows a large mass in the optic nerve. Which of the following is the most likely diagnosis?
A. Optic neuritis
B. Optic glioma
C. Optic nerve sheath meningioma
D. Optic nerve trauma
Question 15
A diagram of the human eye is shown below. What is the primary function of the ciliary muscles in this diagram?
A. To change the shape of the lens
B. To regulate the amount of light entering the eye
C. To focus light on the retina
D. To detect movement

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