POST UTME OAU 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The nervous system in humans is responsible for transmitting and proces\sing information. Which of the following types of neurons is responsible for transmitting sensory information from the periphery to the central nervous system?
A. Motor Neurons
B. Sensory Neurons
C. Interneurons
D. Glial Cells
Question 2
A diagram of a simple e\cosystem is shown below. What is the role of the decomposers in this e\cosystem?
A. To produce organic compounds from inorganic compounds
B. To break down dead organisms and recycle nutrients
C. To produce energy from sunlight
D. To regulate the population of other organisms
Question 3
A diagram of the human nervous system is shown below. Which of the following structures is responsible for the transmission of nerve impulses from the sensory receptors to the central nervous system?
A. Sensory receptors
B. Axon
C. D\endrite
D. Synapse
Question 4
The sense organ responsible for detecting changes in light intensity is the retina.
A. True
B. False
C. It is the lens
D. It is the cornea
Question 5
The growth and development of an organism is regulated by a complex interplay of genetic and environmental factors. What is the primary mechanism by which cells in a developing organism communicate with each other?
A. Hormones
B. Signaling Molecules
C. Cell-Cell Contact
D. Genetic Regulation
Question 6
A researcher is studying the effect of temperature on the growth of a microorganism. The graph below shows the growth of the microorganism at different temperatures. What is the temperature at which the growth rate is maximum?
A. 30°C
B. 35°C
C. 40°C
D. 45°C
Question 7
In the xylem, water and minerals are transported from the roots to the leaves through the process of
A. Transpiration Pull
B. Root Pressure
C. Transpiration Push
D. Capillary Action
Question 8
The diagram below represents a cross between two true-breeding lines of Drosophila melanogaster. What is the probability that a progeny will be homozygous dominant?
A. 0.25
B. 0.5
C. 0.75
D. 1
Question 9
A diagram of a simple cell is shown below. What is the function of the mitochondria in this cell?
A. To synthesize proteins from amino acids
B. To generate energy for the cell through cellular respiration
C. To store genetic information in the form of DNA
D. To regulate the movement of materials in and out of the cell
Question 10
A diagram of the human circulatory system is shown below. Which of the following structures is responsible for the transport of oxygenated blood from the lungs to the heart?
A. Pulmonary arteries
B. Pulmonary veins
C. Left atrium
D. Right ventricle
Question 11
A plant has a genotype of 'Tt' for the trait 'flower color'. If the plant is crossed with a plant having the genotype 'Tt', what is the probability that the offspring will have the genotype 'TT'?
A. 0.25
B. 0.5
C. 0.75
D. 0.33
Question 12
In the context of evolutionary theories, what is the primary mechanism driving the adaptation of populations to changing environments?
A. Natural Selection
B. Genetic Drift
C. Gene Flow
D. Mutation
Question 13
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
A. It is responsible for detecting light
B. It is involved in the regulation of pupil size
C. It is responsible for the accommodation of the eye
D. It is involved in the production of tears
Question 14
In the context of cell division, what is the role of the spindle fibers?
A. They are responsible for the separation of chromosomes during anaphase
B. They are involved in the regulation of the cell cycle
C. They are responsible for the movement of the centrioles
D. They are involved in the production of the mitotic spindle
Question 15
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of
A. Glu\cose and Oxygen
B. Starch and Carbon Dioxide
C. Protein and Water
D. Fat and Nitrogen

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