POST UTME LASU 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A patient is diagnosed with a rare genetic disorder caused by a point mutation in the DNA sequence. The mutation results in the substitution of a \single amino acid in a protein. What type of mutation is this?
A. Frameshift mutation
B. Point mutation
C. Deletion mutation
D. Insertion mutation
Question 2
A diagram of the human eye is shown below. Identify the part labeled 'A'?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 3
A geneticist is studying the inheri\tance of a trait in a population of plants. The trait is controlled by a \single gene with two alleles, one dominant and one recessive. Which of the following genotypes would be the result of a cross between two heterozygous individuals?
A. BB
B. Bb
C. bb
D. BB + Bb + bb
Question 4
A population of bacteria is growing exponentially. If the initial population is 1000 cells and the population doubles every 2 hours, what is the population after 6 hours?
A. 10000
B. 20000
C. 40000
D. 80000
Question 5
A plant is classified as belonging to the kingdom Plantae. Which of the following is a characteristic of plants?
A. They have a backbone
B. They are multicellular
C. They have a circulatory system
D. They are heterotrophic
Question 6
A diagram of the human respiratory system is shown below. What is the primary function of the alveoli?
A. Gas exchange
B. Air filtration
C. Mucus production
D. Cilia movement
Question 7
In the context of evolutionary bio\logy, what is the primary mechanism by which species adapt to changing environments?
A. Natural Selection
B. Genetic Drift
C. Gene Flow
D. Mutation
Question 8
A researcher is studying the effects of pollution on a population of birds in a coastal area. The birds are exposed to high levels of heavy metals, which can cause damage to their nervous system. Which of the following sense organs would be most affected by this exposure?
A. Eyes
B. Ears
C. Nose
D. Brain
Question 9
In the context of respiration, what is the primary function of the mitochondria in the cell?
A. To synthesize ATP from glu\cose
B. To break down glu\cose to release energy
C. To store energy in the form of glycogen
D. To transport oxygen to the cell
Question 10
In the process of excretion, what is the primary function of the kidneys?
A. To filter waste products from the blood
B. To regulate blood pressure
C. To maintain electrolyte balance
D. To produce hormones
Question 11
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 12
The xylem tissue in plants is responsible for the transport of water and minerals from the roots to the leaves. Which of the following types of cells is found in the xylem?
A. Parenchyma cells
B. Collenchyma cells
C. Sclerenchyma cells
D. Tracheids
Question 13
A diagram of the human circulatory system is shown below. Identify the part labeled 'B'?
A. Aorta
B. Pulmonary Artery
C. Coronary Artery
D. Femoral Artery
Question 14
The process of genetic recombination during meiosis results in the shuffling of genes between homo\logous chromosomes. What is the primary mechanism responsible for this shuffling?
A. Cros\sing over
B. Indep\endent assortment
C. Gene mutation
D. Gene expression
Question 15
A bio\logist is studying the structure of a neuron. The neuron has a long axon that carries signals away from the cell body. Which of the following parts of the neuron would be responsible for generating the action potential?
A. D\endrites
B. Cell body
C. Axon
D. Myelin sheath

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