POST UTME NOUN 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a tropical rainforest e\cosystem, what is the primary mechanism by which nutrients are cycled from dead organisms to living ones?
A. Decomposition by fungi and bacteria
B. Uptake by plant roots
C. Release by insect larvae
D. Exchange through symbiotic relationships
Question 2
A population of rabbits is growing exponentially. Which of the following is a characteristic of the population growth curve?
A. The population grows at a cons\tant rate
B. The population grows exponentially
C. The population grows linearly
D. The population remains cons\tant
Question 3
A diagram shows a titration setup. If the burette contains 0.1 M HCl and the flask contains 0.1 M NaOH, what is the pH of the solution after 10 mL of HCl has been added?
A. 7
B. 10
C. 12
D. 14
Question 4
In the context of asexual reproduction, what is the primary advantage of budding in yeast?
A. Increased genetic diversity
B. Reduced energy exp\enditure
C. Enhanced survival rate
D. Improved nutrient uptake
Question 5
A diagram shows a plant with 5 petals on each flower. If the plant is crossed with a plant that has 3 petals on each flower, what is the probability that the offspring will have 4 petals on each flower?
A. 0.5
B. 0.25
C. 0.75
D. 0.33
Question 6
A diagram of a human eye is shown below. What is the function of the structure labeled 'B'?
A. To focus light on the retina
B. To detect light intensity
C. To regulate pupil size
D. To produce tears
Question 7
A 50-year-old man has been experiencing symptoms of chronic kidney disease. His serum creatinine level is 3.5 mg/dL, and his glomerular filtration rate (GFR) is 20 mL/min. What is the likely cause of his kidney dysfunction?
A. Diabetes mellitus
B. Hypertension
C. Chronic obstructive pulmonary disease (COPD)
D. Rheumatoid arthritis
Question 8
In a population of 1000 individuals, 70% are heterozygous for the gene controlling the ABO blood type. If 10% of the population are type A, 20% are type B, and 70% are type AB, what is the probability that two randomly selected individuals will both be type A?
A. 0.01
B. 0.1
C. 0.2
D. 0.5
Question 9
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 10
A cell is in the G2 phase of the cell cycle. If the cell is treated with a drug that prevents the cell from entering mitosis, what will happen to the cell?
A. The cell will undergo programmed cell death.
B. The cell will continue to grow and divide.
C. The cell will enter the G1 phase.
D. The cell will remain in the G2 phase.
Question 11
In the classification of living things, what is the primary function of the kingdom level?
A. To group organisms based on their cell structure
B. To categorize organisms based on their body symmetry
C. To classify organisms based on their mode of nutrition
D. To group organisms based on their genetic makeup
Question 12
In a human cell, what is the primary function of the Golgi apparatus?
A. Protein synthesis
B. Cell signaling
C. Lipid metabolism
D. Protein modification and transport
Question 13
In a population of 1000 individuals, 80% are heterozygous for the sickle cell gene, 15% are homozygous dominant, and 5% are homozygous recessive. What is the expected frequency of the sickle cell allele in this population?
A. 0.4
B. 0.5
C. 0.6
D. 0.7
Question 14
In a plant cell, what is the primary function of the mitochondria?
A. Photosynthesis
B. Cell signaling
C. Lipid metabolism
D. Cellular respiration
Question 15
A population of bacteria is growing exponentially with a growth rate of 0.2 per hour. If the initial population is 1000, calculate the population after 3 hours.
A. 2000
B. 4000
C. 6000
D. 8000

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