POST UTME DELSU 2019 Biology | Objective

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Question 1
In a eukaryotic cell, the process of meiosis results in the production of four haploid daughter cells. What is the primary function of the synaptonemal complex during meiosis?
Correct A. To facilitate the exchange of genetic material between homo\logous chromosomes
B. To regulate the separation of sister chromatids
C. To ensure the accurate alignment of chromosomes during metaphase
D. To control the condensation of chromatin

Correct Answer: A

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Question 2
A researcher is studying the genetic basis of a particular trait in a population of Drosophila melanogaster. The researcher has identified a gene that is linked to the trait and wants to determine the frequency of the gene in the population. What statistical analysis would be most appropriate for this study?
A. Chi-squared test
B. T-test
C. ANOVA
Correct D. Genetic linkage analysis

Correct Answer: D

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Question 3
A patient has been diagnosed with a bacterial infection. The patient's symptoms include fever, chills, and a productive cough. The patient's white blood cell count is elevated. What type of bacteria is most likely responsible for this infection?
A. Staphylococcus aureus
B. Escherichia coli
C. Pseudomonas aeruginosa
Correct D. Klebsiella pneumoniae

Correct Answer: D

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Question 4
A researcher is studying the effects of a particular environmental toxin on the development of a species of frog. The researcher has collected data on the number of frogs that have developed abnormalities in their limbs. What statistical analysis would be most appropriate for this study?
A. Regression analysis
B. ANOVA
Correct C. Chi-squared test
D. T-test

Correct Answer: C

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Question 5
A patient has been diagnosed with a viral infection. The patient's symptoms include a sore throat, fever, and a rash. The patient's white blood cell count is normal. What type of virus is most likely responsible for this infection?
A. Influenza virus
B. Herpes simplex virus
C. Human immunodeficiency virus
Correct D. Rubella virus

Correct Answer: D

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Question 6
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. 0.48
B. 0.32
C. 0.16
D. 0.64

Correct Answer: A

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Question 7
A 2.0-mL sample of a solution containing 0.1 M NaCl is added to a 10.0-mL sample of a solution containing 0.05 M NaOH. What is the concentration of the resulting solution?
A. 0.005 M
B. 0.01 M
Correct C. 0.015 M
D. 0.02 M

Correct Answer: C

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Question 8
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.25
Correct B. 0.5
C. 0.75
D. 0.9

Correct Answer: B

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Question 9
A 5.0-mL sample of a solution containing 0.1 M HCl is added to a 10.0-mL sample of a solution containing 0.05 M NaOH. What is the concentration of the resulting solution?
A. 0.005 M
Correct B. 0.01 M
C. 0.015 M
D. 0.02 M

Correct Answer: B

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Question 10
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'rr'. What is the probability that the offspring will have the genotype 'RR'?
A. 0.25
Correct B. 0.5
C. 0.75
D. 0.9

Correct Answer: B

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Question 11
The process by which a cell divides into two daughter cells is called _______________________
Correct A. Mitosis
B. Meiosis
C. Binary Fission
D. Endospore Formation

Correct Answer: A

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Question 12
The genetic material in a cell is made up of _______________________
Correct A. DNA and RNA
B. Proteins and Carbohydrates
C. Lipids and Fats
D. Nucleotides and Amino Acids

Correct Answer: A

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Question 13
The process by which a plant cell becomes a specialized cell is called _______________________
Correct A. Differentiation
B. Mitosis
C. Meiosis
D. Endospore Formation

Correct Answer: A

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Question 14
The hormone that regulates the growth and development of plants is called _______________________
Correct A. Auxin
B. Gibberellin
C. Cytokinin
D. Ethylene

Correct Answer: A

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Question 15
The process by which a cell becomes specialized to perform a specific function is called _______________________
Correct A. Differentiation
B. Mitosis
C. Meiosis
D. Endospore Formation

Correct Answer: A

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Question 16
In the context of cell division, what is the primary function of the spindle fibers during anaphase?
A. To attach the sister chromatids to the spindle fibers
Correct B. To separate the sister chromatids and move them to opposite poles
C. To form the nuclear envelope around the chromosomes
D. To condense the chromosomes

Correct Answer: B

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Question 17
A population of bacteria is growing exponentially. If the initial population is 100 and the population doubles every 2 hours, what is the population after 6 hours?
A. 1000
B. 2000
C. 4000
Correct D. 8000

Correct Answer: D

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Question 18
In the context of evolutionary theory, what is the term for the process by which a species becomes reproductively isolated from other species?
Correct A. Speciation
B. Adaptation
C. Mutation
D. Genetic drift

Correct Answer: A

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Question 19
A plant hormone that promotes cell elongation and cell division is?
Correct A. Auxin
B. Ethylene
C. Abscisic acid
D. Gibberellin

Correct Answer: A

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Question 20
In the context of nervous system function, what is the primary role of the neurotransmitter dopamine?
A. To transmit signals from sensory receptors to the central nervous system
B. To regulate muscle contraction and relaxation
C. To facilitate learning and memory
Correct D. To control appetite and reward

Correct Answer: D

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Question 21
The process of excretion in the kidney involves the filtration of blood in the glomerulus, followed by the reabsorption of water and ions in the renal tubules. Which of the following is the primary mechanism responsible for the reabsorption of glu\cose in the renal tubules?
Correct A. Sodium-glu\cose cotransporter
B. Proton-coupled glu\cose transporter
C. Glu\cose transporter 2
D. Facilitative glu\cose transporter

Correct Answer: A

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Question 22
The xylem in a plant consists of tracheids, vessels, and xylem parenchyma cells. Which of the following is the primary function of the xylem parenchyma cells?
A. Conduction of water and minerals
Correct B. Storage of starch and proteins
C. Production of ethylene
D. Regulation of stomatal opening

Correct Answer: B

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Question 23
The human eye has a complex system of muscles and ligaments that control the shape of the lens and the amount of light that enters the eye. Which of the following is the primary function of the ciliary muscles?
A. To focus light on the retina
B. To regulate the amount of light that enters the eye
Correct C. To control the shape of the lens
D. To produce tears

Correct Answer: C

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Question 24
The process of respiration in humans involves the breakdown of glu\cose to produce energy. Which of the following is the primary product of glycolysis?
Correct A. Pyruvate
B. Lactic acid
C. Ethanol
D. Carbon dioxide

Correct Answer: A

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Question 25
The human body has a complex system of transport systems that allow for the movement of subs\tances throughout the body. Which of the following is the primary function of the circulatory system?
Correct A. To transport oxygen and nutrients to cells
B. To remove waste products from the body
C. To regulate body temperature
D. To produce hormones

Correct Answer: A

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