POST UTME CHRISTOPHER UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells is known as
A. Mitosis
B. Meiosis
C. Binary Fission
D. Endoreduplication
Question 2
A 2.5 L container holds 2.0 mol of an ideal gas at 298 K. What is the pressure of the gas?
A. 1.01 x 10^5 Pa
B. 2.02 x 10^5 Pa
C. 3.03 x 10^5 Pa
D. 4.04 x 10^5 Pa
Question 3
The theory of evolution by natural selection was first proposed by Charles Darwin in his book 'On the Origin of Species'. Which of the following is a key mechanism of evolution that leads to the adaptation of organisms to their environment?
A. Mutation
B. Genetic drift
C. Gene flow
D. Natural selection
Question 4
In the context of respiration, what is the primary function of the mitochondria in a cell?
A. To synthesize ATP from glu\cose
B. To break down glu\cose into carbon dioxide and water
C. To regulate the pH of the cell
D. To transport oxygen into the cell
Question 5
The xylem in plants is responsible for transporting
A. Water and minerals
B. Sugars and amino acids
C. Oxygen and carbon dioxide
D. Hormones and waste products
Question 6
A diagram of a titration setup is shown below. What is the volume of the acid added?
A. 20
B. 30
C. 40
D. 50
Question 7
A scientist is studying the structure of a human cell. Which of the following organelles is responsible for protein synthesis?
A. Mitochondria
B. Ribosome
C. Vacuole
D. Nucleus
Question 8
In the context of eco\logy, what is the primary function of a keystone species in a given e\cosystem?
A. To occupy a unique eco\logical niche
B. To regulate the population of other species
C. To facilitate the exchange of nutrients between species
D. To maintain the structural diversity of the e\cosystem
Question 9
A researcher is studying the effect of a new medication on blood pressure in a group of patients. The data shows a significant decrease in blood pressure after treatment. However, the researcher notices that the data points are not normally distributed. What statistical test would be most appropriate to use?
A. t-test
B. ANOVA
C. Kruskal-Wallis
D. Wilcoxon rank-sum test
Question 10
In a population of 1000 individuals, 70% have the genotype AA, 20% have the genotype Aa, and 10% have the genotype aa. What is the frequency of the recessive allele 'a'?
A. 0.10
B. 0.20
C. 0.30
D. 0.40
Question 11
In a tropical rainforest, the xylem tissue in the stem of a tree is responsible for transporting water and minerals from the roots to the leaves. What is the primary mechanism by which the xylem tissue achieves this transport?
A. Transpiration pull
B. Root pressure
C. Capillary action
D. Osmosis
Question 12
A 25-year-old patient presents with symptoms of fatigue, weakness, and shortness of breath. Laboratory tests reveal a low hemoglobin level of 8 g/dL. What is the most likely diagnosis?
A. Iron deficiency anemia
B. Vitamin B12 deficiency anemia
C. Folate deficiency anemia
D. Sickle cell anemia
Question 13
A species of plant has a unique adaptation that allows it to survive in a environment with high levels of salt. What type of classification is this an example of?
A. Kingdom
B. Phylum
C. Class
D. Adaptation
Question 14
A species of bird has a unique mating ritual that involves a complex sequence of songs and dances. What type of reproductive strategy is this an example of?
A. Asexual reproduction
B. Sexual reproduction
C. Parthenogenesis
D. Hermaphroditism
Question 15
A researcher is studying the population dynamics of a rabbit population in a controlled environment. The population grows according to the \logistic growth equation: dP/dt = rP\( 1 - P/K \). What is the carrying capacity (K) of the population?
A. 10
B. 20
C. 30
D. 40

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