POST UTME UNIBEN 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the process of osmoregulation, which of the following is a key mechanism by which the kidney helps to maintain the balance of electrolytes and water in the body?
A. Active transport of ions
B. Passive transport of ions
C. Osmosis
D. Diffusion
Question 2
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the plant is exposed to a light intensity of 200 μmol m-2 s-1, what is the plant's quantum yield?
A. 0.05
B. 0.1
C. 0.2
D. 0.5
Question 3
A neuron is stimulated by a hormone that binds to a specific receptor on the neuron's surface. What type of coordination is this an example of?
A. Hormonal coordination
B. Nervous coordination
C. Both hormonal and nervous coordination
D. Neither hormonal nor nervous coordination
Question 4
A plant grows in a controlled environment with optimal conditions for growth. What is the primary factor limiting its growth?
A. Light
B. Water
C. Nutrients
D. Temperature
Question 5
A person has a damaged sense organ that affects their ability to perceive certain sounds. Which of the following sense organs is most likely affected?
A. Ear
B. Eye
C. Nose
D. Tongue
Question 6
The human nervous system is responsible for controlling the body's movements, sensations, and functions. Which of the following is a type of neuron that plays a crucial role in the transmission of nerve impulses?
A. Motor neuron
B. Sensory neuron
C. Interneuron
D. Glia cell
Question 7
A diagram of a human eye is shown below. What is the function of the structure labeled 'B'?
A. Cornea
B. Iris
C. Lens
D. Retina
Question 8
Which of the following enzymes is responsible for the breakdown of starch into maltose?
A. Amylase
B. Lactase
C. Maltase
D. Sucrase
Question 9
In the context of classification of living things, what is the primary function of the kingdom level?
A. To group organisms based on their cell structure
B. To group organisms based on their body structure
C. To group organisms based on their metabolic processes
D. To group organisms based on their genetic makeup
Question 10
A plant grows in a controlled environment with a cons\tant temperature of 25°C and a relative humidity of 60%. The plant's growth rate is measured over a period of 10 days. Which of the following best describes the relationship between the plant's growth rate and time?
A. Linear
B. Exponential
C. Logarithmic
D. Inverse
Question 11
A genetic trait is inherited in an autosomal dominant pattern. What is the probability that a child will inherit the dominant allele if one parent is homozygous dominant and the other parent is heterozygous?
A. \frac{1}{2}
B. \frac{2}{3}
C. \frac{3}{4}
D. \frac{4}{5}
Question 12
A 0.5 M solution of NaOH is mixed with a 0.5 M solution of HCl. What is the resulting concentration of the solution?
A. 0.5 M
B. 1.0 M
C. 1.5 M
D. 2.0 M
Question 13
In the human respiratory system, what is the primary function of the alveoli?
A. Exchange of oxygen and carbon dioxide between the lungs and the bloodstream
B. Production of mucus to trap dust and other particles
C. Regulation of breathing rate and depth
D. Storage of oxygen for later use
Question 14
In a eukaryotic cell, what is the primary function of the Golgi apparatus?
A. Protein synthesis
B. Cell signaling
C. Modification and transport of proteins and lipids
D. Cell division
Question 15
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. Cell wall
B. Cytoplasm
C. Nucleus
D. Mitochondria

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