POST UTME LAUTECH 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'Rr'?
A. 1/4
B. 1/2
C. 3/4
D. 1
Question 2
A diagram of a human blood cell is shown below. What is the primary function of the red blood cells?
A. To transport oxygen from the lungs to the body's tissues
B. To transport carbon dioxide from the body's tissues to the lungs
C. To fight infections and diseases
D. To regulate the body's temperature
Question 3
A diagram of the xylem and phloem tissues in a plant stem is shown below. What is the primary function of the xylem tissue?
A. Transport of sugars and amino acids
B. Transport of water and minerals
C. Support and storage of the plant
D. Regulation of the plant's growth
Question 4
A diagram of a plant's xylem and phloem is shown below. What is the primary function of the xylem?
A. To transport water and minerals from the roots to the leaves
B. To transport sugars and other organic compounds from the leaves to the roots
C. To provide support and structure to the plant
D. To regulate the plant's temperature
Question 5
A diagram of the respiratory system is shown below. What is the primary function of the alveoli?
A. Exchange of oxygen and carbon dioxide
B. Filtering of the blood
C. Production of mucus
D. Regulation of the respiratory rate
Question 6
In a typical photosynthetic reaction, what is the primary function of the light-dep\endent reactions?
A. To produce ATP and NADPH from light energy
B. To synthesize glu\cose from CO2 and H2O
C. To break down glu\cose into CO2 and H2O
D. To absorb and store energy from sunlight
Question 7
A patient is diagnosed with a genetic disorder that affects the production of a specific enzyme. Which of the following is a likely consequence of this disorder?
A. Increased risk of cancer
B. Decreased risk of cancer
C. Increased risk of cardiovascular disease
D. Decreased risk of cardiovascular disease
Question 8
A microorganism is isolated from a patient and identified as Staphylococcus aureus. What is the primary mode of transmission of this microorganism?
A. Airborne transmission
B. Contact transmission
C. Vector-borne transmission
D. Waterborne transmission
Question 9
In the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Maintenance of blood pressure
C. Stimulation of the immune system
D. Regulation of the stress response
Question 10
A population of Drosophila melanogaster is being studied for its response to selection pressure. The initial population mean body length is 10 mm, with a s\tandard deviation of 1 mm. After 10 generations of selection for increased body length, the population mean body length has increased to 12 mm, with a s\tandard deviation of 0.8 mm. What is the selection differential (S) in mm?
A. 1.2
B. 1.5
C. 1.8
D. 2.0
Question 11
A diagram of a cell membrane is shown below. What is the primary function of the cell membrane?
A. To regulate cell growth
B. To store nutrients
C. To transport subs\tances
D. To provide structural support
Question 12
In a typical e\cosystem, what is the primary function of decomposers?
A. To produce organic compounds from inorganic subs\tances
B. To break down dead organisms and recycle nutrients
C. To synthesize complex molecules from simple ones
D. To absorb and store energy from sunlight
Question 13
A 2.0 L solution contains 0.1 M glu\cose and 0.01 M fructose. What is the concentration of glu\cose in the solution after 10 minutes if the solution is stirred at a rate of 100 rpm?
A. 0.05 M
B. 0.075 M
C. 0.1 M
D. 0.125 M
Question 14
In a typical e\cosystem, what is the primary function of producers?
A. To consume and store energy from sunlight
B. To break down dead organisms and recycle nutrients
C. To synthesize complex molecules from simple ones
D. To absorb and store energy from sunlight
Question 15
A 2.5 cm long xylem vessel has a diameter of 0.5 mm. What is the cross-sectional area of the vessel?
A. 0.1963 cm^2
B. 0.7854 cm^2
C. 1.963 cm^2
D. 7.854 cm^2

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