POST UTME LAUTECH 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 2
A diagram of the human nervous system is shown below. Which part of the brain is responsible for controlling voluntary movements?
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal Cord
Question 3
In a population of 1000 individuals, the frequency of the dominant allele is 0.6 and the frequency of the recessive allele is 0.4. What is the expected frequency of the heterozygous genotype?
A. 0.24
B. 0.36
C. 0.48
D. 0.60
Question 4
In a population of 1000 individuals, 700 are heterozygous for the gene controlling flower color. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the recessive allele?
A. 0.25
B. 0.30
C. 0.35
D. 0.40
Question 5
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 6
A cell is placed in a solution containing 0.1 M glu\cose and 0.01 M fructose. The cell membrane is permeable to glu\cose but not to fructose. What is the concentration of glu\cose in the cell after 30 minutes?
A. 0.05 M
B. 0.075 M
C. 0.1 M
D. 0.125 M
Question 7
In the context of evolutionary theories and adaptations, what is the primary mechanism of natural selection?
A. Genetic drift
B. Gene flow
C. Mutation
D. Survival and reproduction of individuals with favorable traits
Question 8
A 50-year-old man has been experiencing symptoms of kidney failure. His blood urea nitrogen (BUN) level is 40 mg/dL, and his serum creatinine level is 2.5 mg/dL. What is the likely cause of his kidney failure?
A. Diabetic nephropathy
B. Hypertensive nephrosclerosis
C. Chronic glomerulonephritis
D. Acute tubular necrosis
Question 9
A plant cell has a cell wall, a large central vacuole, and a small nucleus. What is the primary function of the cell wall?
A. Support and protection
B. Storage of nutrients
C. Regulation of cell growth
D. Transport of subs\tances
Question 10
A diagram of the human eye is shown below. What is the function of the lens?
A. To focus light on the retina
B. To detect light intensity
C. To regulate pupil size
D. To produce tears
Question 11
A population of E. coli is being studied for its response to antibiotics. The initial population size is 10^6 cells, with a growth rate of 0.5/h. After 2 hours of exposure to the antibiotic, the population size has decreased to 10^4 cells. What is the rate of death \( in 1/h \) if the population size is assumed to follow an exponential decay model?
A. 0.05
B. 0.1
C. 0.15
D. 0.2
Question 12
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 13
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.36
B. 0.64
C. 0.72
D. 0.84
Question 14
In the context of the classification of living things, which of the following kingdoms is characterized by the presence of true branching in their thalli?
A. Bryophyta
B. Pteridophyta
C. Gymnospermae
D. Angiospermae
Question 15
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

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