POST UTME REDEEMERS UNIVERSITY 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 2
A diagram of the human eye is shown below. What is the function of the structure labeled 'W'?
A. Regulation of light entry
B. Focus of light
C. Detection of light
D. Production of tears
Question 3
A diagram of a human kidney is shown below. Identify the structure labeled 'C'.
A. Nephron
B. Glomerulus
C. Renal pelvis
D. Ureter
Question 4
A 50-gram sample of a subs\tance is found to have a mass of 25 grams after being placed in a 100-gram container. What is the density of the subs\tance?
A. 0.5 g/cm^3
B. 1.0 g/cm^3
C. 1.5 g/cm^3
D. 2.0 g/cm^3
Question 5
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 6
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 7
A 2.5-liter solution of 0.5 M NaCl is diluted by adding 1 liter of water. What is the new concentration of NaCl?
A. 0.3 M
B. 0.4 M
C. 0.5 M
D. 0.6 M
Question 8
In a typical xylem vessel, what is the primary function of the lignin component?
A. To provide structural support to the vessel
B. To facilitate the transport of water and minerals
C. To regulate the rate of transpiration
D. To prevent the collapse of the vessel
Question 9
A species of plant has a chromosome number of 2n = 16. If it is a diploid organism, what is the number of chromosomes in its gametes?
A. 8
B. 16
C. 32
D. 64
Question 10
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 11
A diagram of a simple harmonic motion is shown below. Identify the part labeled A.
A. Spring
B. Mass
C. Damping
D. Energy
Question 12
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 13
Asexual reproduction in plants can occur through the production of spores. Which of the following is a characteristic of spores?
A. They are produced in large numbers and are dispersed by wind or water
B. They are produced in small numbers and are dispersed by insects
C. They are produced in large numbers and are dispersed by insects
D. They are produced in small numbers and are dispersed by wind or water
Question 14
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 15
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

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