POST UTME BOWEN UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a eukaryotic cell, the \endoplasmic reticulum is involved in the synthesis of proteins that are destined for secretion or for use within the cell. Which of the following statements is true about the \endoplasmic reticulum?
A. The \endoplasmic reticulum is a type of organelle found only in plant cells.
B. The \endoplasmic reticulum is involved in the synthesis of proteins that are destined for use within the cell.
C. The \endoplasmic reticulum is a type of organelle found in both plant and animal cells.
D. The \endoplasmic reticulum is involved in the synthesis of proteins that are destined for secretion.
Question 2
A patient is diagnosed with a bacterial infection that is resis\tant to multiple antibiotics. Which of the following is a likely consequence of this infection?
A. The patient will experience a rapid decline in their condition.
B. The patient will require a longer duration of antibiotic treatment.
C. The patient will experience a slower rate of recovery.
D. The patient will not require antibiotic treatment.
Question 3
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
A. 0.36
B. 0.64
C. 0.16
D. 0.84
Question 4
A plant cell has a vacuole that contains 0.5 M sucrose. If the cell membrane is permeable to sucrose, what is the concentration of sucrose in the cytosol after 10 minutes?
A. 0.2 M
B. 0.3 M
C. 0.4 M
D. 0.5 M
Question 5
A patient is diagnosed with a fungal infection that is cau\sing a skin rash. Which of the following is a likely consequence of this infection?
A. The patient will experience a rapid decline in their condition.
B. The patient will require a longer duration of antifungal treatment.
C. The patient will experience a slower rate of recovery.
D. The patient will not require antifungal treatment.
Question 6
In a random sample of 1000 individuals, the mean height is 175 cm with a s\tandard deviation of 5 cm. What is the probability that a randomly selected individual has a height greater than 180 cm?
A. 0.0228
B. 0.0446
C. 0.0664
D. 0.0882
Question 7
In a human embryo, the process of gastrulation is initiated by the formation of the primitive streak. What is the primary function of the primitive streak?
A. To form the notochord
B. To establish the anterior-posterior axis
C. To create the embryonic layers
D. To initiate organogenesis
Question 8
A 1.5 L solution contains 0.2 M glu\cose. If 0.5 L of this solution is diluted with water, what is the concentration of glu\cose in the resulting solution?
A. 0.1 M
B. 0.15 M
C. 0.2 M
D. 0.25 M
Question 9
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. 0.64
B. 0.36
C. 0.16
D. 0.04
Question 10
A plant has a certain number of seeds, and each seed produces 8 new seeds. If the plant produces 240 new seeds, how many seeds did the plant originally have?
A. 15
B. 20
C. 25
D. 30
Question 11
A certain type of bacteria doubles in population every 2 hours. If there are initially 100 bacteria, how many bacteria will there be after 6 hours?
A. 1600
B. 3200
C. 6400
D. 12800
Question 12
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the light intensity is increased by a factor of 4, what will be the new photosynthetic rate?
A. 20 μmol CO2 s-1
B. 40 μmol CO2 s-1
C. 80 μmol CO2 s-1
D. 100 μmol CO2 s-1
Question 13
A diagram of the human eye is shown below. What is the primary function of the lens?
A. To focus light on the retina
B. To regulate pupil size
C. To detect light intensity
D. To transmit visual signals to the brain
Question 14
A 1.5 L solution contains 0.5 M glu\cose. If 0.5 L of this solution is removed, what is the new concentration of glu\cose?
A. 0.25 M
B. 0.5 M
C. 0.75 M
D. 1.0 M
Question 15
A 5-year-old child has a body mass of 20 kg and a surface area of 0.5 m^2. If the child's basal metabolic rate is 100 W, what is the child's rate of heat loss?
A. 50 W
B. 75 W
C. 100 W
D. 125 W

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