POST UTME SUMMIT UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Maintenance of blood glu\cose levels
C. Response to stress and anxiety
D. Regulation of appetite and satiety
Question 2
The xylem and phloem tissues in a plant are responsible for transporting water and nutrients, respectively. What is the primary mechanism by which water is transported through the xylem?
A. Transpiration pull
B. Osmosis
C. Diffusion
D. Active transport
Question 3
A diagram of the human kidney is shown below.
A. The glomerulus is responsible for filtering waste from the blood.
B. The renal pelvis is responsible for storing urine.
C. The calyces are responsible for collecting urine.
D. The ureters are responsible for transporting urine to the bladder.
Question 4
The Hardy-Weinberg principle states that the frequency of a gene in a population remains cons\tant from generation to generation in the absence of genetic drift, mutation, and gene flow. What is the primary reason for the Hardy-Weinberg principle?
A. To describe the genetic variation in a population
B. To predict the frequency of a gene in a population
C. To explain the concept of genetic drift
D. To demonstrate the concept of natural selection
Question 5
A photosynthetic organism is placed in a light-limited environment. What is the expected outcome regarding its growth rate?
A. Increased growth rate
B. Decreased growth rate
C. No change in growth rate
D. The plant will die
Question 6
In a human cell, what is the function of the Golgi apparatus?
A. Protein synthesis
B. Cell signaling
C. Lipid modification
D. Protein transport
Question 7
A patient is experiencing symptoms of dehydration. Which of the following is a common sign of dehydration?
A. Increased urine output
B. Decreased urine output
C. Dry mouth and throat
D. All of the above
Question 8
A 0.1 M solution of sodium hydroxide (NaOH) is titrated with a solution of hydrochloric acid (HCl). The reaction is as follows:\n\n2NaOH + HCl → NaCl + 2H2O\n\nWhat is the number of moles of hydrochloric acid that react with 0.2 moles of sodium hydroxide?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 9
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of glu\cose. Which of the following is a byproduct of this process?
A. Oxygen
B. Carbon dioxide
C. Water
D. Nitrogen
Question 10
A 2 m long rod is heated from 20°C to 100°C. If the coefficient of linear expansion is 10^-5 K^-1, what is the change in length of the rod?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 11
In a population of E. coli, the frequency of the dominant allele 'B' is 0.8. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous recessive genotype?
A. 0.16
B. 0.64
C. 0.36
D. 0.04
Question 12
A solution of glu\cose (C6H12O6) is titrated with a solution of potassium permanganate (KMnO4). The reaction is as follows:\n\nC6H12O6 + 12H2O + 6MnO4- → 6CO2 + 24H+ + 6MnO2\n\nWhat is the number of moles of glu\cose that react with 0.5 moles of potassium permanganate?
A. 0.25
B. 0.5
C. 0.75
D. 1
Question 13
In the context of evolutionary theories, what is the primary mechanism by which genetic drift influences the frequency of a particular allele in a population?
A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation
Question 14
A plant cell is placed in a solution with a high concentration of sucrose. What is the expected outcome regarding the movement of water into the cell?
A. Water will move out of the cell
B. Water will move into the cell
C. Water will remain the same
D. The cell will burst
Question 15
A patient is diagnosed with a blood disorder that affects the production of red blood cells. Which of the following is a likely consequence of this disorder?
A. Increased hemoglobin levels
B. Decreased hemoglobin levels
C. Increased white blood cell count
D. Decreased platelet count

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