POST UTME KSU 2024 Biology | Objective

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Question 1 View Details
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. 0.36
B. 0.64
C. 0.72
D. 0.88

Correct Answer: A

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Question 2 View Details
A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.25 m from its equilibrium position and released from rest. What is the maximum speed of the block?
A. 0.5 m/s
Correct B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s

Correct Answer: B

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Question 3 View Details
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'rr'?
A. 0.25
Correct B. 0.5
C. 0.75
D. 0.9

Correct Answer: B

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Question 4 View Details
A 0.5 M solution of NaOH is mixed with a 0.5 M solution of HCl. What is the pH of the resulting solution?
A. 0
Correct B. 1
C. 2
D. 3

Correct Answer: B

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Question 5 View Details
A 1.0 L solution of 0.1 M HCl is mixed with a 1.0 L solution of 0.1 M NaOH. What is the pH of the resulting solution?
A. 0
Correct B. 1
C. 2
D. 3

Correct Answer: B

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Question 6 View Details
In a population of 1000 bacteria, 80% are susceptible to a particular antibiotic. If 200 bacteria are exposed to the antibiotic, what is the expected number of resis\tant bacteria?
A. 30
Correct B. 40
C. 50
D. 60

Correct Answer: B

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Question 7 View Details
A 2.5 L gas sample at 27°C contains 0.5 mol of O2 and 0.2 mol of CO2. Calculate the partial pressure of CO2.
A. 0.5 atm
Correct B. 0.7 atm
C. 0.9 atm
D. 1.1 atm

Correct Answer: B

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Question 8 View Details
A 50-year-old man presents with symptoms of glaucoma. His intraocular pressure (IOP) is 25 mmHg. What is the most likely cause of his glaucoma?
A. Open-angle glaucoma
Correct B. Angle-closure glaucoma
C. Normal-tension glaucoma
D. Secondary glaucoma

Correct Answer: B

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Question 9 View Details
A 30-year-old woman presents with symptoms of kidney disease. Her serum creatinine level is 2.5 mg/dL. What is the most likely cause of her kidney disease?
Correct A. Diabetic nephropathy
B. Hypertensive nephrosclerosis
C. Chronic pyelonephritis
D. Polycystic kidney disease

Correct Answer: A

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Question 10 View Details
A 40-year-old man presents with symptoms of respiratory disease. His FEV1/FVC ratio is 0.7. What is the most likely diagnosis?
Correct A. Chronic obstructive pulmonary disease (COPD)
B. Asthma
C. Cystic fibrosis
D. Pulmonary embolism

Correct Answer: A

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Question 11 View Details
In a population of 1000 individuals, 70% are heterozygous for the gene controlling the ABO blood type. If 20% of the population are type A, 40% are type B, and 30% are type AB, what is the probability that a randomly selected individual is type O?
Correct A. 0.05
B. 0.10
C. 0.15
D. 0.20

Correct Answer: A

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Question 12 View Details
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. site of protein synthesis
B. site of cell division
C. site of cell signaling
Correct D. site of cell growth

Correct Answer: D

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Question 13 View Details
A diagram of a human eye is shown below. What is the function of the structure labeled 'Y'?
A. site of vision proces\sing
B. site of light entry
Correct C. site of image formation
D. site of eye movement

Correct Answer: C

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Question 14 View Details
A diagram of a bacterial cell is shown below. What is the function of the structure labeled 'Z'?
Correct A. site of protein synthesis
B. site of cell division
C. site of cell signaling
D. site of cell growth

Correct Answer: A

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Question 15 View Details
A diagram of a human brain is shown below. What is the function of the structure labeled 'W'?
A. site of vision proces\sing
B. site of hearing proces\sing
C. site of motor control
Correct D. site of sensory input

Correct Answer: D

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Question 16 View Details
In the context of eco\logy, what is the primary function of a keystone species in a given biome?
A. To regulate the population of other species
Correct B. To maintain the structure of the e\cosystem
C. To facilitate nutrient cycling
D. To provide shelter for other species

Correct Answer: B

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Question 17 View Details
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell's turgor pressure?
Correct A. It will increase
B. It will decrease
C. It will remain the same
D. It will become negative

Correct Answer: A

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Question 18 View Details
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
Correct A. To focus light on the retina
B. To regulate the amount of light entering the eye
C. To detect color
D. To detect movement

Correct Answer: A

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Question 19 View Details
A diagram of the human circulatory system is shown below. What is the function of the part labeled 'B'?
A. To pump blood throughout the body
Correct B. To carry oxygenated blood from the lungs to the heart
C. To carry deoxygenated blood from the heart to the lungs
D. To regulate blood pressure

Correct Answer: B

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Question 20 View Details
A diagram of the human digestive system is shown below. What is the function of the part labeled 'C'?
A. To break down food into smaller molecules
B. To mix food with digestive enzymes
Correct C. To absorb nutrients into the bloodstream
D. To store food for later use

Correct Answer: C

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Question 21 View Details
In a tropical rainforest e\cosystem, the presence of a large population of a specific species of tree can lead to a phenomenon known as the "edge effect". What is the primary consequence of this effect on the surrounding environment?
A. Increased biodiversity
B. Reduced soil erosion
C. Enhanced nutrient cycling
Correct D. Decreased primary productivity

Correct Answer: D

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Question 22 View Details
A researcher is studying the growth patterns of a certain species of plant. The plant's growth rate is measured over a period of time, and the data is plotted on a graph. What type of growth pattern is exhibited by the plant if the graph shows a sigmoidal shape?
A. Exponential growth
Correct B. Logistic growth
C. Linear growth
D. Stationary growth

Correct Answer: B

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Question 23 View Details
A patient is diagnosed with a kidney disorder that affects the kidneys' ability to filter waste products from the blood. Which of the following organs is responsible for the production of erythropoietin, a hormone that stimulates red blood cell production?
A. Liver
Correct B. Kidneys
C. Spleen
D. Bone marrow

Correct Answer: B

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Question 24 View Details
A couple is trying to conceive a child, but the woman has a history of recurrent miscarriages. Which of the following reproductive structures is most likely to be affected in this condition?
A. Ovaries
Correct B. Fallopian tubes
C. Uterus
D. Cervix

Correct Answer: B

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Question 25 View Details
A researcher is studying the effects of a new pesticide on a population of insects. The pesticide is applied to a field, and the population is monitored over time. What type of data analysis would be most appropriate for this study?
A. Regression analysis
Correct B. Time-series analysis
C. ANOVA
D. Chi-square test

Correct Answer: B

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