POST UTME PAN-ATLANTIC UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a human respiratory system is shown below. Identify the pathway by which air enters the lungs.
A. Trachea
B. Bronchi
C. Alveoli
D. Diaphragm
Question 2
A neuron is stimulated by an action potential that travels along its axon. What is the primary mechanism by which the action potential is transmitted?
A. Diffusion of ions through the cell membrane
B. Active transport of ions through the cell membrane
C. Passive transport of ions through the cell membrane
D. Electrical conduction through the axon
Question 3
The sense organ responsible for detecting changes in light intensity is the?
A. Eye
B. Ear
C. Nose
D. Mouth
Question 4
A patient is diagnosed with a rare genetic disorder characterized by an inability to synthesize the amino acid phenylalanine. Which of the following enzymes is deficient in this disorder?
A. Phenylalanine hydroxylase
B. Tyro\sine aminotransferase
C. Dihydropteridine reductase
D. GTP cyclohydrolase
Question 5
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Mitochondria
B. Chloroplast
C. Nucleus
D. Vacuole
Question 6
A patient is diagnosed with a kidney stone that is composed of calcium oxalate. Which of the following is the most likely cause of this condition?
A. Hyperparathyroidism
B. Gastrointestinal disorders
C. Genetic predisposition
D. Dehydration
Question 7
A gene is expressed in a specific tissue type due to the presence of a specific transcription factor. What is the primary mechanism by which the transcription factor regulates gene expression?
A. Direct binding to the promoter region
B. Indirect binding to the promoter region
C. Binding to a specific enhancer element
D. Binding to a specific silencer element
Question 8
A cell with a volume of 100 μm³ has a surface area of 50 μm². What is the surface-to-volume ratio of the cell?
A. 0.5
B. 1
C. 2
D. 5
Question 9
A species of bird has a beak length of 5 cm. The beak grows at a rate of 0.2 cm/year. How long will it take for the beak to reach a length of 10 cm?
A. 10 years
B. 20 years
C. 30 years
D. 40 years
Question 10
The genetic material in eukaryotic cells is organized into
A. Chromosomes
B. Mitochondria
C. Ribosomes
D. Lysosomes
Question 11
The xylem tissue in plants is responsible for transporting water and minerals from the roots to the leaves. Which of the following statements is true about the xylem?
A. It is a type of vascular tissue found in the phloem.
B. It transports water and minerals from the roots to the leaves.
C. It is responsible for photosynthesis in the leaves.
D. It is a type of meristematic tissue found in the roots.
Question 12
The process of asexual reproduction in which a new individual is produced from a part of a parent's body is called?
A. Binary fission
B. Budding
C. Fragmentation
D. Regeneration
Question 13
In a xylem vessel, water and minerals are transported from the roots to the leaves through the process of
A. Transpiration
B. Translocation
C. Osmosis
D. Diffusion
Question 14
A researcher is studying the respiration of a plant. Which of the following is the primary function of the mitochondria in this process?
A. To produce ATP through the citric acid cycle
B. To generate NADH and FADH2 through glycolysis
C. To produce oxygen through photosynthesis
D. To break down glu\cose through cellular respiration
Question 15
A diagram of the human nervous system is shown below. Identify the part labeled 'A'.
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal cord

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