POST UTME AFE BABALOLA UNIVERSITY 2020 Biology | Objective

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Question 1
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. If a population of 1000 individuals has a frequency of 0.4 for the dominant allele (A) and 0.6 for the recessive allele (a), what is the expected frequency of the homozygous recessive genotype (aa) in the next generation?
Correct A. 0.36
B. 0.24
C. 0.48
D. 0.64

Correct Answer: A

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Question 2
A diagram of a plant's xylem and phloem is shown below. What is the primary function of the xylem in this plant?
Correct A. transporting water and minerals
B. transporting sugars and amino acids
C. supporting the plant's structure
D. regulating the plant's temperature

Correct Answer: A

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Question 3
In a certain e\cosystem, the population of rabbits is limited by the availability of food. If the population of rabbits is currently 100 and the carrying capacity of the e\cosystem is 500, what is the expected population of rabbits after one year if the growth rate is 0.2?
A. 120
B. 140
Correct C. 160
D. 180

Correct Answer: C

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Question 4
A diagram of a cell is shown below. What is the primary function of the mitochondria in this cell?
Correct A. producing energy for the cell
B. regulating the cell's temperature
C. supporting the cell's structure
D. controlling the cell's growth

Correct Answer: A

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Question 5
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. If a population of 1000 individuals has a frequency of 0.4 for the dominant allele (A) and 0.6 for the recessive allele (a), what is the expected frequency of the heterozygous genotype (Aa) in the next generation?
A. 0.24
Correct B. 0.36
C. 0.48
D. 0.64

Correct Answer: B

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Question 6
In asexual reproduction, what is the primary mechanism by which genetic variation is introduced?
A. Mutation
B. Gene flow
C. Genetic drift
Correct D. Genetic recombination

Correct Answer: D

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Question 7
What is the primary function of the mitochondria in eukaryotic cells?
A. Protein synthesis
B. Cell signaling
Correct C. Energy production
D. Cell division

Correct Answer: C

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Question 8
In the process of photosynthesis, what is the byproduct of the light-dep\endent reactions?
Correct A. ATP and NADPH
B. Glu\cose and oxygen
C. Water and carbon dioxide
D. Protons and electrons

Correct Answer: A

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Question 9
What is the primary function of the Golgi apparatus in eukaryotic cells?
A. Protein synthesis
B. Cell signaling
Correct C. Modification and packaging of proteins
D. Cell division

Correct Answer: C

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Question 10
In the process of cellular respiration, what is the byproduct of the citric acid cycle?
Correct A. ATP and NADH
B. Glu\cose and oxygen
C. Water and carbon dioxide
D. Protons and electrons

Correct Answer: A

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Question 11
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 12
The process by which microorganisms cause disease in humans is known as
Correct A. Infection
B. Toxicity
C. Allergenicity
D. Mutagenicity

Correct Answer: A

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Question 13
The e\cosystem that is characterized by a large number of species and a high level of biodiversity is known as
Correct A. Tropical Rainforest
B. Desert E\cosystem
C. Grassland E\cosystem
D. Tundra E\cosystem

Correct Answer: A

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Question 14
The type of genetic variation that occurs when a new mutation arises in a population is known as
A. Genetic Drift
Correct B. Mutation
C. Gene Flow
D. Natural Selection

Correct Answer: B

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Question 15
The sense organ that is responsible for detecting changes in light intensity is known as
Correct A. Eye
B. Ear
C. Nose
D. Mouth

Correct Answer: A

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Question 16
The process by which the shape of an organism is determined by the interaction of its genotype and the environment is known as
A. Genotype
Correct B. Phenotype
C. Epigenetics
D. Gene Expression

Correct Answer: B

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Question 17
The type of eco\logical niche that is characterized by a specific set of environmental conditions is known as
A. Habitat
B. Niche
Correct C. Eco\logical Niche
D. Environmental Niche

Correct Answer: C

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Question 18
The process by which an organism's genetic information is passed from one generation to the next is known as
A. Genetic Drift
B. Mutation
C. Gene Flow
Correct D. Heritability

Correct Answer: D

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Question 19
The type of genetic variation that occurs when a new species arises from an existing one is known as
Correct A. Speciation
B. Genetic Drift
C. Mutation
D. Gene Flow

Correct Answer: A

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Question 20
The sense organ that is responsible for detecting changes in sound waves is known as
A. Eye
Correct B. Ear
C. Nose
D. Mouth

Correct Answer: B

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Question 21
The process by which an organism's genetic information is altered by external factors is known as
A. Genetic Drift
B. Mutation
C. Gene Flow
Correct D. Epigenetics

Correct Answer: D

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Question 22
In the process of cellular respiration, what is the primary function of the mitochondria?
Correct A. To synthesize ATP from glu\cose
B. To break down glu\cose into carbon dioxide and water
C. To regulate the cell's pH levels
D. To synthesize proteins from amino acids

Correct Answer: A

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Question 23
What is the primary function of the xylem in plants?
Correct A. To transport water and minerals from the roots to the leaves
B. To transport sugars and amino acids from the leaves to the roots
C. To regulate the plant's water potential
D. To synthesize chlorophyll from glu\cose

Correct Answer: A

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Question 24
What is the term for the process by which cells become specialized to perform specific functions?
Correct A. Differentiation
B. Mitosis
C. Meiosis
D. Apoptosis

Correct Answer: A

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Question 25
What is the primary function of the blood in the transport system?
Correct A. To transport oxygen and nutrients to the cells
B. To transport waste products and carbon dioxide from the cells
C. To regulate the body's pH levels
D. To synthesize proteins from amino acids

Correct Answer: A

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