POST UTME ABU 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?
A. The cell will shrink due to water loss
B. The cell will swell due to water uptake
C. The cell will remain unchanged
D. The cell will burst due to osmotic pressure
Question 2
A species of fish has a unique adaptation that allows it to survive in low-oxygen environments. What is an example of this adaptation?
A. Lamellate gills
B. Branchial respiration
C. Cu\taneous respiration
D. Branchial respiration
Question 3
A plant cell is placed in a solution with a high concentration of sucrose. What would be the effect on the cell's turgor pressure?
A. Increase
B. Decrease
C. No change
D. Variable
Question 4
A cell is placed in a solution with a high concentration of glu\cose. What would be the effect on the cell's membrane potential?
A. Hyperpolarization
B. Depolarization
C. No change
D. Variable
Question 5
A population of rabbits is growing exponentially. If the initial population size is 100 and the growth rate is 20% per year, what will be the population size after 5 years?
A. 1000
B. 2000
C. 4000
D. 8000
Question 6
A plant cell is shown below. Identify the structure labeled 'X'?
A. Cell Wall
B. Vacuole
C. Chloroplast
D. Mitochondria
Question 7
A geneticist is studying the inheri\tance of a trait in a population of mice. The trait is controlled by a \single gene with two alleles: A and a. The geneticist wants to determine the genotype and phenotype of the offspring of a cross between two heterozygous parents. What would be the expected genotype and phenotype of the offspring?
A. Genotype: AA, Phenotype: A
B. Genotype: Aa, Phenotype: A
C. Genotype: aa, Phenotype: a
D. Genotype: AA, Phenotype: a
Question 8
A population of birds is declining due to habitat loss. If the initial population size is 1000 and the decline rate is 10% per year, what will be the population size after 5 years?
A. 500
B. 750
C. 1000
D. 1250
Question 9
The process of meiosis in a diploid cell results in the production of four haploid cells. Which of the following statements is true regarding the genetic variation in these cells?
A. The four haploid cells have the same genetic makeup as the parent cell.
B. The four haploid cells have a 50% chance of inheriting the dominant allele and a 50% chance of inheriting the recessive allele.
C. The four haploid cells have a 25% chance of inheriting the dominant allele and a 75% chance of inheriting the recessive allele.
D. The four haploid cells have a 75% chance of inheriting the dominant allele and a 25% chance of inheriting the recessive allele.
Question 10
In a typical e\cosystem, what is the primary function of the digestive system in a herbivorous mammal?
A. To break down and absorb nutrients from the consumed plant material
B. To excrete waste products of metabolism
C. To regulate body temperature
D. To produce digestive enzymes
Question 11
In a photosynthetic pathway, what is the primary function of the enzyme RuBisCO?
A. Fixation of CO2
B. Reduction of NADP+
C. Regeneration of RuBP
D. Oxidation of NADPH
Question 12
A bacterium is growing in a culture medium. The growth rate of the bacterium is proportional to the amount of food available in the medium. If the initial population size is 100 and the growth rate is 0.5 per hour, what will be the population size after 2 hours?
A. 200
B. 400
C. 600
D. 800
Question 13
A diagram of the human circulatory system is shown below. Identify the structure labeled 'Z'?
A. Heart
B. Aorta
C. Pulmonary Artery
D. Coronary Artery
Question 14
A diagram of the human respiratory system is shown below. Identify the structure labeled 'A'?
A. Trachea
B. Lungs
C. Diaphragm
D. Bronchi
Question 15
In a photosynthetic pathway, what is the primary function of the enzyme RuBisCO?
A. Fixing CO2 into a 3-carbon molecule
B. Converting RuBP into 2 PGA molecules
C. Regenerating RuBP from 3 PGA molecules
D. Reducing NADP+ to NADPH

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