POST UTME LAUTECH 2018 Biology | Objective

Are you preparing for POST UTME LAUTECH exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2018 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
Correct A. 0.64
B. 0.36
C. 0.16
D. 0.04

Correct Answer: A

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Question 2
A certain species of plant has a photosynthetic rate of 5.2 mg CO2/h per leaf. If the plant has 12 leaves, what is the total photosynthetic rate of the plant?
Correct A. 62.4 mg CO2/h
B. 62.4 mg CO2/min
C. 62.4 mg CO2/s
D. 62.4 mg CO2/day

Correct Answer: A

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Question 3
In a certain e\cosystem, the primary producers are phytoplankton, which have a growth rate of 0.5/h. If the initial population of phytoplankton is 1000 cells/L, what is the population after 4 hours?
A. 1000 cells/L
B. 2000 cells/L
Correct C. 4000 cells/L
D. 8000 cells/L

Correct Answer: C

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Question 4
A certain species of animal has a metabolic rate of 120 W. If the animal is at rest, what is the rate of heat production?
Correct A. 120 W
B. 240 W
C. 360 W
D. 480 W

Correct Answer: A

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Question 5
In a certain e\cosystem, the primary consumers are zooplankton, which have a growth rate of 0.2/h. If the initial population of zooplankton is 500 cells/L, what is the population after 2 hours?
A. 500 cells/L
B. 1000 cells/L
Correct C. 1500 cells/L
D. 2000 cells/L

Correct Answer: C

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Question 6
In a closed e\cosystem, what is the primary mechanism by which energy is transferred from one trophic level to the next?
Correct A. Photosynthesis
B. Decomposition
C. Herbivory
D. Detritivory

Correct Answer: A

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Question 7
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. Mitochondria
Correct B. Chloroplast
C. Nucleus
D. Vacuole

Correct Answer: B

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Question 8
What is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Mutation
B. Genetic Drift
C. Natural Selection
Correct D. Heritability

Correct Answer: D

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Question 9
A diagram of a human eye is shown below. What is the function of the structure labeled 'B'?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 10
What is the term for the movement of water from the roots to the leaves of a plant?
Correct A. Transpiration
B. Translocation
C. Osmosis
D. Diffusion

Correct Answer: A

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Question 11
In the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Maintenance of blood pressure
C. Stimulation of the immune system
Correct D. Regulation of electrolyte balance

Correct Answer: D

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Question 12
A plant is placed in a solution with a high concentration of sucrose. Which of the following transport systems would be most active in this situation?
A. Symplast
B. Apoplast
C. Xylem
Correct D. Phloem

Correct Answer: D

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Question 13
A population of rabbits is introduced to a new island. Over time, the population grows exponentially. Which of the following evolutionary theories best explains this phenomenon?
Correct A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation

Correct Answer: A

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Question 14
A patient is diagnosed with kidney failure. Which of the following excretory organs would be most affected by this condition?
A. Liver
B. Lungs
C. Skin
Correct D. Kidneys

Correct Answer: D

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Question 15
A plant is placed in a controlled environment with a cons\tant temperature and humidity. Which of the following growth regulators would be most active in this situation?
A. Auxin
Correct B. Gibberellin
C. Cytokinin
D. Ethylene

Correct Answer: B

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Question 16
In the xylem, water and minerals are transported from the roots to the leaves through the process of
Correct A. Transpiration Pull
B. Root Pressure
C. Transpiration Push
D. Capillary Action

Correct Answer: A

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Question 17
The process of excretion in plants involves the removal of excess
Correct A. Water and ions
B. Excess sugars and amino acids
C. Waste products such as urea and creatinine
D. Excess salts and minerals

Correct Answer: A

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Question 18
The respiratory system in humans is responsible for the exchange of
Correct A. Oxygen and carbon dioxide
B. Nitrogen and oxygen
C. Carbon dioxide and water
D. Oxygen and nitrogen

Correct Answer: A

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Question 19
The process of osmoregulation in animals involves the regulation of
Correct A. Water and ion balance
B. pH and temperature
C. Blood pressure and heart rate
D. Respiratory rate and breathing depth

Correct Answer: A

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Question 20
The e\cosystem of a rainforest is characterized by a high level of
Correct A. Biodiversity
B. Primary production
C. Decomposition
D. Nutrient cycling

Correct Answer: A

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Question 21
In the xylem, water and minerals are transported from the roots to the leaves through the process of
Correct A. Transpiration Pull
B. Root Pressure
C. Transpiration Push
D. Capillary Action

Correct Answer: A

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Question 22
The sense organ responsible for detecting changes in light intensity is the
Correct A. Eye
B. Ear
C. Nose
D. Mouth

Correct Answer: A

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Question 23
The process of cell division that results in the production of four daughter cells is
Correct A. Mitosis
B. Meiosis
C. Binary Fission
D. Multiple Fission

Correct Answer: A

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Question 24
The tissue that consists of a group of nerve cells is the
A. Epithelial Tissue
B. Connective Tissue
C. Muscular Tissue
Correct D. Nervous Tissue

Correct Answer: D

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Question 25
The system of the body that consists of the heart, lungs, and blood vessels is the
Correct A. Circulatory System
B. Respiratory System
C. Nervous System
D. Digestive System

Correct Answer: A

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