POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 50 kg person is s\tanding on a scale in a room with a temperature of 20°C. If the atmospheric pressure is 1 atm, what is the normal force exerted on the person?
A. 590 N
B. 490 N
C. 390 N
D. 290 N
Question 2
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'?
A. 0.64
B. 0.36
C. 0.16
D. 0.24
Question 3
What is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Mutation
B. Genetic drift
C. Gene flow
D. Heritability
Question 4
A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. If 0.5 mol of the gas is removed, what is the new pressure of the gas?
A. 2.5 atm
B. 3.5 atm
C. 4.5 atm
D. 5.5 atm
Question 5
A diagram of a human digestive system is shown below. What is the function of the pancreas in this system?
A. To produce digestive enzymes
B. To absorb nutrients from the small intestine
C. To regulate blood sugar levels
D. To produce hormones that stimulate digestion
Question 6
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. Assuming the block undergoes simple harmonic motion, calculate the maximum speed of the block.
A. 0.25 m/s
B. 0.50 m/s
C. 0.75 m/s
D. 1.00 m/s
Question 7
In the process of reproduction, what is the term for the fusion of male and female gametes to form a zygote?
A. Fertilization
B. Meiosis
C. Mitosis
D. Syngamy
Question 8
A 50-year-old man has a family history of prostate cancer. His prostate-specific antigen (PSA) level is 10 ng/mL. What is the most likely diagnosis?
A. Benign prostatic hyperplasia
B. Prostate cancer
C. Prostatitis
D. Prostatic calculi
Question 9
What is the term for the process by which an organism's genetic information is altered by external factors?
A. Mutation
B. Genetic drift
C. Gene flow
D. Epigenetics
Question 10
Asexual reproduction in bacteria is an example of what type of reproduction?
A. Binary Fission
B. Mitosis
C. Meiosis
D. Photosynthesis
Question 11
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 0.2 per hour, what is the population size after 2 hours?
A. 200
B. 400
C. 600
D. 800
Question 12
A 0.50 M solution of NaOH is mixed with a 0.25 M solution of HCl. What is the pH of the resulting solution?
A. 1.00
B. 2.00
C. 3.00
D. 4.00
Question 13
A diagram of a human circulatory system is shown below. What is the function of the heart in this system?
A. To pump blood from the heart to the lungs
B. To pump blood from the heart to the rest of the body
C. To filter waste products from the blood
D. To regulate body temperature
Question 14
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the light intensity is increased by a factor of 4, what is the new photosynthetic rate?
A. 40 μmol CO2 s-1
B. 20 μmol CO2 s-1
C. 10 μmol CO2 s-1
D. 5 μmol CO2 s-1
Question 15
A certain species of bacteria grows according to the equation N(t) = N0e^(kt), where N(t) is the population at time t, N0 is the initial population, and k is the growth rate. If the initial population is 1000 and the population doubles in 2 hours, what is the growth rate?
A. 0.10/h
B. 0.20/h
C. 0.30/h
D. 0.40/h

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