POST UTME UNIPORT 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 25-year-old woman presents with symptoms of anemia. Her hemoglobin level is 8g/dL. Which of the following is the most likely cause of her anemia?
A. Iron deficiency anemia
B. Vitamin B12 deficiency anemia
C. Folate deficiency anemia
D. Sickle cell anemia
Question 2
The process of natural selection involves the adaptation of organisms to their environment. Which of the following best describes the mechanism of natural selection?
A. The survival and reproduction of organisms that are best adapted to their environment.
B. The death and extinction of organisms that are poorly adapted to their environment.
C. The mutation of genes that result in the adaptation of organisms to their environment.
D. The migration of organisms from one environment to another.
Question 3
A 5.0-g sample of a compound containing only carbon and hydrogen is burned in oxygen to produce 2.5 L of CO2 at 25°C and 1 atm. What is the molar mass of the compound?
A. 12 g/mol
B. 24 g/mol
C. 36 g/mol
D. 48 g/mol
Question 4
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. 0.16
B. 0.36
C. 0.64
D. 0.84
Question 5
In a population of 1000 individuals, 70% are heterozygous for the ABO blood group gene, 20% are homozygous dominant, and 10% are homozygous recessive. What is the expected frequency of the recessive allele in this population?
A. 0.05
B. 0.1
C. 0.15
D. 0.2
Question 6
The process of photosynthesis in plants involves the conversion of light energy into chemical energy. Which of the following best describes the equation for photosynthesis?
A. 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O2
B. 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 H2O
C. 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 CO2
D. 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 H2O + 6 O2
Question 7
In the human circulatory system, blood is pumped from the heart through the arteries and into the capillaries. What is the primary function of the capillaries?
A. To transport oxygen and nutrients to the cells
B. To remove waste products from the cells
C. To regulate blood pressure
D. To produce red blood cells
Question 8
A researcher is studying the effect of temperature on the growth of a microorganism. The researcher measures the growth of the microorganism at different temperatures and plots the data on a graph. If the graph shows a linear relationship between temperature and growth, what does this indicate about the growth of the microorganism?
A. The growth of the microorganism is limited by a lack of nutrients.
B. The growth of the microorganism is regulated by a feedback mechanism.
C. The growth of the microorganism is directly proportional to the temperature.
D. The growth of the microorganism is indirectly proportional to the temperature.
Question 9
A cell undergoing mitosis has a chromosome number of 46. What is the ploidy level of this cell?
A. Diploid
B. Haploid
C. Triploid
D. Tetraploid
Question 10
A 28-year-old woman presents with symptoms of depression. She has a history of trauma and has been experiencing flashbacks. Which of the following is the most appropriate treatment for her condition?
A. Selective serotonin reuptake inhibitors (SSRIs)
B. Serotonin-norepinephrine reuptake inhibitors (SNRIs)
C. Tricyclic antidepressants (TCAs)
D. Monoamine oxidase inhibitors (MAOIs)
Question 11
The process of mitosis in eukaryotic cells involves the replication of DNA and the separation of chromosomes. Which of the following best describes the order of events during mitosis?
A. Prophase, metaphase, anaphase, telophase, cytokinesis
B. Prophase, anaphase, metaphase, telophase, cytokinesis
C. Metaphase, prophase, anaphase, telophase, cytokinesis
D. Telophase, metaphase, anaphase, prophase, cytokinesis
Question 12
A 2-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 recessive allele. What is the probability that their next child will be affected by the disorder?
A. 1/4
B. 1/2
C. 3/4
D. 1
Question 13
In the human eye, light enters through the cornea and is focused by the lens onto the retina. What is the primary function of the retina?
A. To detect light and convert it into electrical signals
B. To focus light onto the retina
C. To regulate the amount of light entering the eye
D. To produce tears to lubricate the eye
Question 14
A 2.5 L flask contains a mixture of O2 and N2 gases at a total pressure of 2.0 atm. If the partial pressure of O2 is 0.8 atm, what is the mole \fraction of O2 in the mixture?
A. 0.4
B. 0.5
C. 0.6
D. 0.7
Question 15
A plant has a leaf with a stomatal density of 100 stomata per square millimeter. What is the stomatal frequency of this leaf?
A. 100 stomata/mm2
B. 10 stomata/mm2
C. 1 stomata/mm2
D. 0.1 stomata/mm2

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