POST UTME AAUA 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The genetic principle that states that the characteristics of an organism are determined by the interaction of two or more genes is known as?
A. Incomplete dominance
B. Codominance
C. Epistasis
D. Polygenic inheri\tance
Question 2
A 2.0 L flask contains 1.0 mol of an ideal gas at 300 K. If 1.0 mol of another ideal gas is added to the flask, what is the new pressure of the mixture?
A. 1.0 atm
B. 2.0 atm
C. 3.0 atm
D. 4.0 atm
Question 3
In a typical terrestrial e\cosystem, what is the primary mechanism by which plants convert light energy into chemical energy?
A. Respiration
B. Photosynthesis
C. Decomposition
D. Fermentation
Question 4
The diagram below shows a cross-section of a plant root. Which of the following tissues is responsible for the absorption of water and minerals?
A. Xylem
B. Cortex
C. Endodermis
D. Pericycle
Question 5
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. 0.2
B. 0.4
C. 0.6
D. 0.8
Question 6
A patient has a blood pressure of 120/80 mmHg. If the patient takes a medication that lowers the systolic blood pressure by 10 mmHg, what is the new blood pressure?
A. 110/80 mmHg
B. 120/90 mmHg
C. 130/80 mmHg
D. 140/90 mmHg
Question 7
A cell is placed in a medium containing 0.1 M glu\cose and 0.1 M fructose. If the cell is able to transport glu\cose but not fructose, what will be the concentration of glu\cose in the cell after 1 hour?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 8
A nerve impulse travels from the d\endrite to the axon hillock. What is the direction of the impulse?
A. From d\endrite to axon hillock
B. From axon hillock to d\endrite
C. In a circular motion
D. In a zigzag motion
Question 9
A 5.0 L flask contains 2.0 mol of CO2 at 300 K. If the flask is heated to 400 K, what is the new pressure of the gas?
A. 1.0 atm
B. 2.0 atm
C. 2.5 atm
D. 3.0 atm
Question 10
A researcher is studying the effect of pH on the growth of E. coli. The researcher measures the growth rate of the bacteria at different pH levels and plots the data on a graph. Which of the following types of graphs would best represent the data?
A. Line graph
B. Bar graph
C. Scatter plot
D. Histogram
Question 11
The process of digestion in the human body involves the breakdown of food into smaller molecules that can be absorbed and utilized by the body. Which of the following enzymes is responsible for breaking down proteins?
A. Amylase
B. Lipase
C. Protease
D. Lactase
Question 12
A population of 500 rabbits is introduced to a new habitat. The population grows at a rate of 20% per year. What is the population after 3 years?
A. 900
B. 1000
C. 1200
D. 1500
Question 13
In asexual reproduction, what is the primary mechanism by which genetic variation is introduced?
A. Mutation
B. Genetic recombination
C. Gene duplication
D. Gene deletion
Question 14
In the context of eco\logy, what is the term for the number of different species present in a given area?
A. Biodiversity
B. Species richness
C. Species evenness
D. Species abundance
Question 15
In the context of eco\logy, what is the term for the process by which an e\cosystem returns to its original state after a disturbance?
A. Succession
B. Regeneration
C. Recovery
D. Resilience

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: