POST UTME MADONNA UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant grows in a nutrient-poor soil. Which of the following is a likely adaptation of the plant?
A. Deep roots to access water and nutrients
B. Large leaves to increase photosynthesis
C. Small leaves to reduce water loss
D. Thick stems to store water
Question 2
A certain species of bird has a wingspan of 1.5 meters. If the bird is flying at a speed of 50 km/h, what is the angle of attack of the wing?
A. 15^\circ
B. 20^\circ
C. 25^\circ
D. 30^\circ
Question 3
A diagram shows a cross-section of a root hair cell. Which of the following structures is responsible for the absorption of water?
A. Vacuole
B. Plasmodesmata
C. Tonoplast
D. Cell wall
Question 4
A diagram shows a simplified representation of the electron transport chain. Which of the following is the primary function of Complex III?
A. Proton pumping
B. Electron transfer
C. ATP synthesis
D. Electron leakage
Question 5
In a diploid cell, what is the ratio of heterozygous to homozygous genotypes for a \single gene locus?
A. 1:1
B. 2:1
C. 3:1
D. 4:1
Question 6
A 2.0 L flask contains 1.0 mol of CO2 at 25°C. What is the partial pressure of CO2 in the flask?
A. 0.1 atm
B. 0.2 atm
C. 0.3 atm
D. 0.4 atm
Question 7
In a population of 1000 individuals, 70% are heterozygous for the gene controlling the production of a particular enzyme. If 20% of the population is homozygous recessive, what is the frequency of the recessive allele?
A. 0.2
B. 0.3
C. 0.4
D. 0.5
Question 8
A diagram of a plant's xylem and phloem is shown below. What is the primary function of the xylem?
A. Transporting water and minerals
B. Transporting sugars and amino acids
C. Producing energy through photosynthesis
D. Regulating temperature
Question 9
In the context of evolutionary theories, what is the primary mechanism by which genetic drift contributes to the evolution of a population?
A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation
Question 10
A diagram of the human nervous system is shown below. What is the name of the part labeled 'B'?
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal cord
Question 11
In the context of respiration and gas exchange, what is the primary function of the alveoli in the lungs?
A. To facilitate the exchange of oxygen and carbon dioxide
B. To regulate the pH of the blood
C. To control the rate of breathing
D. To produce surfac\tant
Question 12
A researcher is studying the effect of temperature on the growth of yeast. The researcher measures the growth rate of yeast at different temperatures and plots the data on a graph. If the growth rate is highest at 30°C and decreases as the temperature moves away from 30°C, what type of enzyme is most likely responsible for this phenomenon?
A. Thermalase
B. Thermolase
C. Thermophilase
D. Thermosensitive enzyme
Question 13
A diagram of the human eye is shown below. What is the name of the part labeled 'A'?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 14
A diagram of the human eye is shown below. Identify the part labeled A.
A. Cornea
B. Iris
C. Retina
D. Lens
Question 15
A microorganism is isolated from a patient with a severe infection. The microorganism is found to be a gram-positive, catalase-negative bacterium. What is the most likely cause of the infection?
A. Staphylococcus aureus
B. Streptococcus pneumoniae
C. Escherichia coli
D. Pseudomonas aeruginosa

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