POST UTME LASU 2024 Biology | Objective

Are you preparing for POST UTME LASU exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2024 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

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 expected frequency of the homozygous dominant genotype?
Correct A. 0.36
B. 0.64
C. 0.48
D. 0.16

Correct Answer: A

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Question 2
A diagram of a neuron is shown below. What is the function of the structure labeled 'A'?
Correct A. Synthesis of neurotransmitters
B. Release of neurotransmitters
C. Reception of neurotransmitters
D. Transmission of action potentials

Correct Answer: A

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Question 3
A plant cell is shown below. What is the function of the structure labeled 'B'?
Correct A. Storage of water and nutrients
B. Photosynthesis
C. Cell division
D. Cell growth

Correct Answer: A

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Question 4
A diagram of a human eye is shown below. What is the function of the structure labeled 'C'?
A. B\ending of light
B. Pupil constriction
Correct C. Detection of light
D. Production of tears

Correct Answer: C

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Question 5
A diagram of a human brain is shown below. What is the function of the structure labeled 'D'?
A. Control of movement
B. Regulation of body temperature
C. Control of breathing
Correct D. Regulation of body temperature and hunger

Correct Answer: D

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Question 6
In a population of 1000 individuals, the frequency of the dominant allele is 0.6. What is the expected frequency of the recessive allele?
A. 0.3
Correct B. 0.4
C. 0.5
D. 0.6

Correct Answer: B

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Question 7
A plant has a mutation in its chloroplast DNA that affects the synthesis of chlorophyll. Which of the following would be a likely consequence of this mutation?
A. Increased photosynthesis
Correct B. Reduced photosynthesis
C. No effect on photosynthesis
D. Increased respiration

Correct Answer: B

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Question 8
A 50-year-old man has a blood pressure of 180/100 mmHg. Which of the following would be a likely consequence of this condition?
Correct A. Cardiac hypertrophy
B. Cardiac failure
C. Renal failure
D. Stroke

Correct Answer: A

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Question 9
A 30-year-old woman has a body mass index (BMI) of 35. Which of the following would be a likely consequence of this condition?
Correct A. Type 2 diabetes
B. Hypertension
C. Hyperlipidemia
D. Obesity

Correct Answer: A

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Question 10
A 40-year-old man has a serum creatinine level of 2.5 mg/dL. Which of the following would be a likely consequence of this condition?
Correct A. Renal failure
B. Cardiac failure
C. Liver failure
D. Stroke

Correct Answer: A

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Question 11
A 20-year-old woman has a hemoglobin level of 8 g/dL. Which of the following would be a likely consequence of this condition?
Correct A. Anemia
B. Thalassemia
C. Sickle cell disease
D. Polycythemia

Correct Answer: A

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Question 12
A 30-year-old man has a platelet count of 50,000/μL. Which of the following would be a likely consequence of this condition?
Correct A. Thrombocytopenia
B. Thrombocytosis
C. Leukocytosis
D. Anemia

Correct Answer: A

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Question 13
A 40-year-old woman has a serum calcium level of 12 mg/dL. Which of the following would be a likely consequence of this condition?
A. Hypercalcemia
B. Hypocalcemia
C. Hyperphosphatemia
D. Hypophosphatemia

Correct Answer: VIEW ANSWER

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Question 14
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
Correct A. To store and transport water and minerals
B. To produce and store starch
C. To regulate the rate of water and mineral uptake
D. To facilitate the breakdown of complex organic molecules

Correct Answer: A

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Question 15
A patient is diagnosed with a bacterial infection. The bacteria are gram-positive and have a characteristic 'safety pin' appearance under the microscope. Which of the following is the most likely cause of the infection?
Correct A. Staphylococcus aureus
B. Streptococcus pneumoniae
C. Bacillus subtilis
D. Escherichia coli

Correct Answer: A

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Question 16
The kidneys play a crucial role in the regulation of electrolyte balance in the body. Which of the following electrolytes is primarily excreted in the urine?
A. Sodium
Correct B. Potassium
C. Calcium
D. Magnesium

Correct Answer: B

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Question 17
The human body is composed of various types of tissues, including epithelial, connective, muscle, and nervous tissues. Which of the following is a characteristic feature of epithelial tissue?
Correct A. It is composed of a \single layer of cells
B. It is composed of a multiple layers of cells
C. It is composed of a mixture of cell types
D. It is composed of a \single type of cell

Correct Answer: A

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Question 18
The process of gas exchange in the lungs involves the diffusion of oxygen and carbon dioxide across the alveolar-capillary membrane. Which of the following is a critical factor that affects the rate of gas exchange?
A. The surface area of the alveoli
B. The thickness of the alveolar-capillary membrane
Correct C. The partial pressure of oxygen in the alveoli
D. The partial pressure of carbon dioxide in the blood

Correct Answer: C

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Question 19
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. 0.16
D. 0.04

Correct Answer: A

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Question 20
A researcher is studying the effect of temperature on the growth rate of E. coli. The growth rate is measured in units of cell divisions per hour. Which of the following equations best describes the relationship between temperature and growth rate?
A. \frac{dN}{dt} = kT^2
Correct B. \frac{dN}{dt} = kT
C. \frac{dN}{dt} = kT^3
D. \frac{dN}{dt} = kT^{-2}

Correct Answer: B

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Question 21
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
Question 22
In the context of tissue organization, what is the primary function of the basement membrane in epithelial tissues?
A. To provide structural support to the tissue
B. To regulate the movement of ions and molecules across the epithelial layer
C. To facilitate the exchange of oxygen and nutrients with the bloodstream
Correct D. To act as a barrier against pathogens and toxins

Correct Answer: D

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Question 23
A 25-year-old patient presents with a 2-year history of progressive hearing loss. Audiometry reveals a sensorineural hearing loss. Which of the following is the most likely diagnosis?
A. Otosclerosis
B. Meniere's disease
Correct C. Acoustic neuroma
D. Presbycusis

Correct Answer: C

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Question 24
A 35-year-old woman presents with a 5-year history of progressive weakness and fatigue. Her hemoglobin level is 8 g/dL. Which of the following is the most likely diagnosis?
Correct A. Iron deficiency anemia
B. Thalassemia major
C. Sickle cell disease
D. Vitamin B12 deficiency

Correct Answer: A

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Question 25
A 40-year-old man presents with a 10-year history of progressive kidney disease. His serum creatinine level is 3.5 mg/dL. Which of the following is the most likely diagnosis?
A. Diabetic nephropathy
B. Hypertensive nephrosclerosis
C. Chronic pyelonephritis
Correct D. Polycystic kidney disease

Correct Answer: D

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