POST UTME AFE BABALOLA UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the context of the nervous system, what is the primary function of the axon hillock?
A. To transmit signals to the d\endrites
B. To generate action potentials
C. To synthesize neurotransmitters
D. To regulate ion channels
Question 2
A diagram of the human genetic code is shown below.
A. The genetic code is responsible for storing genetic information
B. The genetic code is responsible for transmitting genetic information
C. The genetic code and DNA work together to store and transmit genetic information
D. The genetic code is responsible for controlling involuntary movements
Question 3
The process of cellular respiration involves which of the following stages?
A. Glycolysis, Pyruvate Oxidation, and the Citric Acid Cycle
B. The Electron Transport Chain, ATP Synthesis, and the Citric Acid Cycle
C. Glycolysis, the Electron Transport Chain, and ATP Synthesis
D. Pyruvate Oxidation, the Citric Acid Cycle, and ATP Synthesis
Question 4
In a tropical rainforest e\cosystem, the primary consumers are primarily herbivores that feed on the abundant vegetation. Which of the following is a characteristic of these primary consumers?
A. They have a high metabolic rate
B. They have a low reproductive rate
C. They have a large body size
D. They have a specialized digestive system
Question 5
What is the primary function of the hypothalamus in the regulation of body temperature?
A. To maintain a cons\tant body temperature
B. To regulate hunger and thirst
C. To control blood pressure
D. To stimulate the release of hormones
Question 6
The xylem tissue in plants is responsible for transporting water and minerals from the roots to the leaves. Which of the following is a characteristic of xylem tissue?
A. It is composed of dead cells
B. It is composed of living cells
C. It is responsible for transporting sugars from the leaves to the roots
D. It is responsible for transporting water and minerals from the roots to the leaves
Question 7
In a xylem vessel, water is transported from the roots to the leaves through a process called
A. osmosis
B. active transport
C. diffusion
D. transpiration pull
Question 8
In a typical xylem vessel, what is the primary function of the lignin component?
A. To provide structural support to the vessel
B. To facilitate the transport of water and minerals
C. To regulate the rate of transpiration
D. To prevent the collapse of the vessel
Question 9
A person has a blood urea nitrogen (BUN) level of 20 mg/dL. What is the approximate percentage of nitrogen in the blood?
A. 0.5%
B. 1%
C. 2%
D. 5%
Question 10
A species of animal has a 30% chance of having a genetic mutation that causes it to be 10% taller than the average height of the species. If the average height of the species is 100 cm, what is the expected height of an individual with the genetic mutation?
A. 90
B. 100
C. 110
D. 120
Question 11
The process of digestion in humans involves the breakdown of food into smaller molecules that can be absorbed and utilized by the body. Which of the following is a type of digestive enzyme?
A. Amylase
B. Lipase
C. Tryp\sin
D. All of the above
Question 12
A patient is diagnosed with a bacterial infection caused by Staphylococcus aureus. Which of the following antibiotics is most likely to be effective against this infection?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
D. Vancomycin
Question 13
The respiratory system in humans is responsible for exchanging gases between the body and the environment. Which of the following is a function of the lungs?
A. To regulate body temperature
B. To produce red blood cells
C. To exchange gases between the body and the environment
D. To filter waste products from the blood
Question 14
The classification of living things is based on which of the following criteria?
A. Cell structure, DNA sequence, and metabolic pathways
B. Morpho\logy, anatomy, and embryonic development
C. Phy\logenetic relationships, genetic diversity, and eco\logical niches
D. Molecular structure, chemical composition, and physical properties
Question 15
In a diploid cell, what is the ratio of heterozygous to homozygous genotypes for a particular gene?
A. 1:1
B. 2:1
C. 3:1
D. 4:1

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