POST UTME BOWEN UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the human eye, the process of vision involves the conversion of light into electrical signals that are transmitted to the brain. Which of the following structures plays a crucial role in this process?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 2
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of glu\cose. Which of the following is a byproduct of this process?
A. Oxygen
B. Carbon dioxide
C. Water
D. Nitrogen
Question 3
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the plant is exposed to light for 8 hours, what is the total amount of CO2 fixed?
A. 80 μmol CO2
B. 160 μmol CO2
C. 320 μmol CO2
D. 640 μmol CO2
Question 4
In the process of respiration, what is the primary function of the mitochondria?
A. Production of ATP
B. Production of NADH
C. Production of FADH2
D. Production of water
Question 5
The diagram below shows the structure of a human heart. Which of the following parts is responsible for pumping blood to the lungs?
A. Left ventricle
B. Right ventricle
C. Pulmonary valve
D. Aorta
Question 6
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
A. Storage of water and minerals
B. Transport of sugars and amino acids
C. Production of ethylene gas
D. Maintenance of turgor pressure
Question 7
What is the primary function of the hypothalamus in the regulation of body temperature?
A. To maintain a cons\tant body temperature through sweating
B. To regulate body temperature through shivering
C. To detect changes in body temperature and s\end signals to the brain
D. To produce heat through metabolic processes
Question 8
In a photosynthetic pathway, which enzyme catalyzes the conversion of ribulose-1,5-bisphosphate to 3-phosphoglycerate?
A. Ribulose-1,5-bisphosphate carboxylase/oxygenase
B. Phosphoglycerate kinase
C. Phosphoglycerate mutase
D. Triosephosphate isomerase
Question 9
In the classification of living things, what is the primary characteristic that distinguishes between prokaryotes and eukaryotes?
A. Presence of a true nucleus
B. Presence of mitochondria
C. Presence of a cell wall
D. Presence of a plasma membrane
Question 10
In the process of photosynthesis, what is the role of the enzyme RuBisCO?
A. To catalyze the conversion of CO2 to glu\cose
B. To regulate the amount of light energy absorbed by the plant
C. To facilitate the transfer of electrons during the light-dep\endent reactions
D. To control the rate of photosynthesis in response to environmental factors
Question 11
The diagram below shows the structure of a neuron. Which part is responsible for transmitting signals to other neurons?
A. Axon
B. D\endrite
C. Cell Body
D. Myelin Sheath
Question 12
In the human body, the process of blood clotting involves the formation of a blood clot to prevent excessive bleeding. Which of the following subs\tances plays a crucial role in this process?
A. Fibrinogen
B. Thrombin
C. Platelets
D. Vitamin K
Question 13
In a tropical rainforest biome, what is the primary mechanism by which nutrients are cycled?
A. Decomposition of organic matter by microorganisms
B. Photosynthesis by plants
C. Nutrient uptake by roots of plants
D. Release of nutrients from soil through weathering
Question 14
A 2.0 L flask contains 1.0 mol of an ideal gas at 298 K. If the gas is allowed to expand to 4.0 L at cons\tant temperature, what is the new pressure?
A. 1.0 atm
B. 2.0 atm
C. 3.0 atm
D. 4.0 atm
Question 15
The process of genetic drift in a population can be influenced by the following factors except:
A. Genetic variation
B. Genetic mutation
C. Genetic recombination
D. Genetic drift

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