POST UTME PAN-ATLANTIC UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The xylem tissue in a plant consists of dead cells that are responsible for transporting water and minerals from the roots to the leaves. Which of the following types of xylem cells is responsible for the majority of water transport?
A. Tracheids
B. Vessel elements
C. Fibers
D. Parechyma
Question 2
A diagram of a titration setup is shown below. What is the purpose of the burette?
A. To measure the volume of the acid
B. To measure the volume of the base
C. To mix the acid and base
D. To measure the pH of the solution
Question 3
The sense organ responsible for detecting changes in sound pressure is the?
A. Ear
B. Eye
C. Nose
D. Tongue
Question 4
A plant has a genotype of 'Rr' for the flower color gene. What is the probability that the plant will produce a flower with the color 'red'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 5
A genetic cross is performed between two organisms with the following genotypes: F1 = AaBb and F2 = AaBb x aaBB. What is the probability of the offspring being homozygous recessive for the B gene?
A. 1/4
B. 1/2
C. 3/4
D. 1
Question 6
In a typical xylem vessel, what is the primary function of the lignin component?
A. To provide structural support to the vessel
B. To facilitate the transport of water and minerals
C. To regulate the rate of transpiration
D. To store nutrients and water
Question 7
A researcher is studying the effect of light on the growth of a plant. The researcher finds that the growth rate of the plant is highest in bright light. What is the likely reason for this?
A. The optimal light intensity for the growth of most plants is bright light.
B. The researcher used a different method to measure the growth rate.
C. The light intensity bright light is the optimal light intensity for the growth of the plant in a specific environment.
D. The researcher found that the growth rate of the plant is highest in bright light.
Question 8
A plant has a mutation that affects the expression of the gene responsible for leaf shape. The plant has a mixture of oval and elliptical leaves. What is the likely genotype of the plant?
A. Ll
B. LL
C. ll
D. Ll
Question 9
A diagram of a neuron is shown below. Which of the following structures is responsible for transmitting signals from the d\endrites to the axon?
A. D\endrite
B. Axon
C. Cell Body
D. Synapse
Question 10
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. However, this principle assumes that the population is infinite, non-overlapping, and randomly mating. Which of the following is NOT a requirement for the Hardy-Weinberg principle to hold?
A. Random mating
B. Non-overlapping generations
C. Infinite population size
D. Genetic drift
Question 11
A plant with the genotype AaBbCcc is crossed with a plant with the genotype AAbbCC. What is the probability that the offspring will have the genotype AaBbCc?
A. 1/4
B. 1/2
C. 3/4
D. 1
Question 12
The process of mitosis in a eukaryotic cell involves the replication of DNA and the subsequent separation of chromosomes into two daughter cells. Which of the following stages of mitosis is characterized by the condensation of chromosomes and the formation of the spindle apparatus?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 13
A diagram of a neuron is shown below. What is the function of the d\endrites?
A. Receive signals from other neurons
B. Transmit signals to other neurons
C. Generate action potentials
D. Maintain the neuron's resting potential
Question 14
A diagram of a typical animal tissue is shown below. What is the primary function of the tissue?
A. To provide structural support
B. To facilitate the exchange of nutrients and waste
C. To regulate body temperature
D. To produce hormones
Question 15
A researcher is studying the effect of pH on the growth of E. coli. The researcher finds that the growth rate of E. coli is highest at pH 7.0. What is the likely reason for this?
A. The optimal pH for E. coli growth is 7.0.
B. The pH 7.0 is the optimal pH for the growth of most bacteria.
C. The researcher used a different method to measure the growth rate.
D. The pH 7.0 is the optimal pH for the growth of E. coli in a specific environment.

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