POST UTME REDEEMERS UNIVERSITY 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a population of 1000 individuals, 70% have the dominant allele for brown eye color (B) and 30% have the recessive allele (b). If two individuals with brown eye color are randomly selected for a genetic study, what is the probability that they are both homozygous dominant (BB)?
A. 0.49
B. 0.51
C. 0.69
D. 0.79
Question 2
A 5-year-old child is diagnosed with a rare genetic disorder that affects the production of a specific enzyme. The child's parents are both carriers of the mutated gene, but they do not have the disorder themselves. What is the probability that their next child will inherit the disorder?
A. 12.5%
B. 25%
C. 37.5%
D. 50%
Question 3
A 0.5 M solution of NaOH is 2 L. What is the concentration of the solution in g/L?
A. 20
B. 40
C. 60
D. 80
Question 4
The classification of living things is based on
A. morpho\logy
B. physio\logy
C. biochemistry
D. genetics
Question 5
A diagram of a human eye is shown below. Identify the structure labeled 'B'.
A. Cornea
B. Iris
C. Lens
D. Retina
Question 6
In a desert e\cosystem, what is the primary mechanism by which plants regulate water loss through their leaves?
A. Stomatal closure
B. Cuticular transpiration
C. Transpiration pull
D. Root pressure
Question 7
A researcher is studying the effect of pH on the growth of E. coli bacteria. The researcher measures the growth rate of the bacteria at different pH levels and plots the data on a graph. Which of the following statements about the graph is most likely true?
A. The graph will show a linear relationship between pH and growth rate.
B. The graph will show a quadratic relationship between pH and growth rate.
C. The graph will show an exponential relationship between pH and growth rate.
D. The graph will show a \logarithmic relationship between pH and growth rate.
Question 8
The process of growth and development in plants is controlled by
A. hormones
B. enzymes
C. nutrients
D. water
Question 9
The genetic code is a set of
A. instructions for protein synthesis
B. rules for gene expression
C. regulations for cell division
D. guidelines for DNA replication
Question 10
In the context of cell division, what is the primary function of the centrioles during the prophase stage of mitosis?
A. To form the spindle fibers
B. To replicate the DNA
C. To condense the chromatin
D. To form the nuclear envelope
Question 11
A diagram of the human eye is shown below. What is the function of the structure labeled 'Y'?
A. Regulation of light entry
B. Focus of light
C. Detection of light
D. Production of tears
Question 12
The genetic variation in a population is measured by
A. allele frequency
B. genotype frequency
C. phenotype frequency
D. homozygosity
Question 13
A diagram of a human kidney is shown below. Identify the structure labeled 'C'.
A. Nephron
B. Glomerulus
C. Renal pelvis
D. Ureter
Question 14
A plant cell is shown below. What is the function of the structure labeled 'X'?
A. Photosynthesis
B. Respiration
C. Storage of nutrients
D. Regulation of cell growth
Question 15
The classification of living things is based on
A. morpho\logy
B. physio\logy
C. biochemistry
D. genetics

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