POST UTME SUMMIT UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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. 0.48
D. 0.16
Question 2
The sense organ responsible for detecting changes in sound pressure is the?
A. Ear
B. Eye
C. Nose
D. Mouth
Question 3
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'BB'?
A. 0.2
B. 0.4
C. 0.6
D. 0.8
Question 4
A 0.5 M solution of NaOH is mixed with a 0.5 M solution of HCl. What is the pH of the resulting solution?
A. 7.0
B. 8.0
C. 9.0
D. 10.0
Question 5
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 6
A patient is diagnosed with a genetic disorder caused by a mutation in the HBB gene. Which of the following is a possible consequence of this mutation?
A. Anemia
B. Sickle cell disease
C. Thalassemia
D. Leukemia
Question 7
A diagram of a plant cell is shown below. Which part of the cell is responsible for photosynthesis?
A. Cell wall
B. Vacuole
C. Chloroplast
D. Mitochondria
Question 8
The human respiratory system is primarily responsible for exchanging which of the following gases?
A. Oxygen and carbon dioxide
B. Nitrogen and oxygen
C. Carbon dioxide and water vapor
D. Oxygen and nitrogen
Question 9
A researcher studying the eco\logy of a forest e\cosystem discovers that the population of a certain species of tree is limited by the availability of light. Which of the following factors is most likely to be the primary limiting factor for this species?
A. Water
B. Light
C. Temperature
D. Nutrients
Question 10
A researcher is studying the effect of pH on the growth of a particular species of bacteria. The researcher measures the growth rate of the bacteria at different pH levels and plots the data on a graph. If the graph shows a sigmoidal curve, what can be concluded about the growth of the bacteria?
A. The bacteria grow exponentially at first, then slow down as they reach their carrying capacity.
B. The bacteria grow linearly at first, then slow down as they reach their carrying capacity.
C. The bacteria grow exponentially throughout their entire growth phase.
D. The bacteria grow linearly throughout their entire growth phase.
Question 11
A plant has a root system with a total surface area of 100 cm². If the plant is placed in a solution with a concentration of 0.1 M, what is the rate of water uptake by the plant?
A. 0.01 cm³/s
B. 0.02 cm³/s
C. 0.03 cm³/s
D. 0.04 cm³/s
Question 12
In a population of 1000 individuals, 70% are heterozygous for a particular gene, while 30% are homozygous recessive. If a random sample of 50 individuals is taken, what is the probability that the sample will contain at least one homozygous dominant individual?
A. 0.25
B. 0.50
C. 0.75
D. 0.90
Question 13
A 50-year-old woman has a family history of breast cancer. She has a BRCA1 mutation. What is the most likely genetic basis for her increased risk of breast cancer?
A. Environmental factors
B. Genetic mutation
C. Hormonal imbalance
D. Lifestyle choices
Question 14
In the context of evolutionary bio\logy, what is the primary mechanism driving the adaptation of populations to changing environments?
A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation
Question 15
What is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Heritability
B. Inheri\tance
C. Genetic variation
D. Mutation

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: