POST UTME IMS U 2017 Biology | Objective

Are you preparing for POST UTME IMS U exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2017 Biology (Objective) questions designed to simulate the real exam environment.

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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'?
A. 0.36
Correct B. 0.64
C. 0.16
D. 0.04

Correct Answer: B

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Question 2
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Lens
Correct C. Retina
D. Iris

Correct Answer: C

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Question 3
A population of bacteria is growing exponentially according to the equation \(N(t) = N_0e^{kt}\). If the initial population is 1000 and the population doubles every 2 hours, what is the growth rate k?
Correct A. 0.3466
B. 0.6931
C. 1.3863
D. 2.7726

Correct Answer: A

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Question 4
A diagram of a simple harmonic motion is shown below. What is the amplitude of the motion?
A. 2m
Correct B. m
C. 2m
D. m

Correct Answer: B

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Question 5
A population of rabbits is growing according to the \logistic equation \(dN/dt = rN\( 1-N/K)\ \). If the carrying capacity K is 1000 and the growth rate r is 0.1, what is the equilibrium population?
A. 250
Correct B. 500
C. 750
D. 1000

Correct Answer: B

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Question 6
In the context of eco\logy, what is the primary function of a keystone species?
Correct A. To maintain the balance of the e\cosystem
B. To regulate the population of other species
C. To provide a source of food for other species
D. To create a habitat for other species

Correct Answer: A

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Question 7
A researcher is studying the effects of pollution on a particular species of fish. Which of the following is a likely consequence of pollution on the fish population?
A. Increased population size
Correct B. Decreased population size
C. No effect on population size
D. Increased diversity of species

Correct Answer: B

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Question 8
A bio\logist is studying the structure of a cell. Which of the following organelles is responsible for protein synthesis?
A. Mitochondria
B. Endoplasmic reticulum
Correct C. Ribosomes
D. Lysosomes

Correct Answer: C

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Question 9
A researcher is studying the effects of climate change on a particular e\cosystem. Which of the following is a likely consequence of climate change on the e\cosystem?
A. Increased biodiversity
Correct B. Decreased biodiversity
C. No effect on biodiversity
D. Increased population size

Correct Answer: B

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Question 10
A bio\logist is studying the life cycle of a particular species of plant. Which of the following stages is responsible for the production of seeds?
A. Germination
B. Seedling
Correct C. Maturation
D. Pollination

Correct Answer: C

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Question 11
The process of excretion in the kidney involves the filtration of blood by the glomerulus, followed by the reabsorption of water and ions in the proximal convoluted tubule. Which of the following statements is NOT true about the reabsorption process?
A. Water and ions are reabsorbed in the proximal convoluted tubule.
Correct B. The reabsorption of water and ions is an active process.
C. The reabsorption of water and ions is a passive process.
D. The reabsorption of water and ions occurs in the distal convoluted tubule.

Correct Answer: B

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Question 12
In the cell cycle, the G1 phase is characterized by cell growth and DNA replication. Which of the following statements is true about the G1 phase?
Correct A. The G1 phase is the longest phase of the cell cycle.
B. The G1 phase is the shortest phase of the cell cycle.
C. The G1 phase is the phase where the cell prepares for mitosis.
D. The G1 phase is the phase where the cell prepares for meiosis.

Correct Answer: A

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Question 13
In the e\cosystem, the producer is the primary consumer of the energy pyramid. Which of the following organisms is a producer?
A. Grasshopper
B. Frog
C. Plankton
Correct D. Bacteria

Correct Answer: D

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Question 14
The human eye has a unique structure that allows it to detect light and transmit visual signals to the brain. Which of the following parts of the eye is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 15
The human body has a unique system that allows it to maintain homeostasis and regulate its internal environment. Which of the following systems is responsible for regulating body temperature?
A. Nervous System
B. Circulatory System
C. Respiratory System
Correct D. Sweat Glands

Correct Answer: D

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Question 16
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the Δπηπερης (Δπη) complex. Which of the following is a key component of the Δπη complex?
A. Histone H3
B. Histone H4
Correct C. Centromere protein CENP-A
D. Topoisomerase II

Correct Answer: C

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Question 17
A researcher is studying the effects of a new pesticide on a population of Drosophila melanogaster. The pesticide is applied at a concentration of 10±0⁴ M. Which of the following is the most likely effect of this pesticide on the population?
A. Increased population size
Correct B. Decreased population size
C. No effect on population size
D. Increased mutation rate

Correct Answer: B

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Question 18
A diagram of a plant cell is shown below. Which of the following organelles is responsible for the synthesis of ATP during photosynthesis?
A. Mitochondria
Correct B. Chloroplast
C. Endoplasmic reticulum
D. Golgi apparatus

Correct Answer: B

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Question 19
A diagram of a human eye is shown below. Which of the following is the primary function of the retina?
A. To focus light on the lens
Correct B. To detect light and convert it into electrical signals
C. To regulate the amount of light entering the eye
D. To produce tears

Correct Answer: B

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Question 20
A diagram of a DNA molecule is shown below. Which of the following is the primary function of the promoter region?
Correct A. To initiate transcription
B. To regulate gene expression
C. To bind RNA polymerase
D. To form a hairpin loop

Correct Answer: A

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Question 21
A population of Drosophila melanogaster is being studied for its genetic variation. If the mean wing length is 5.5 mm and the s\tandard deviation is 0.5 mm, what is the probability that a randomly selected individual will have a wing length greater than 6.0 mm?
A. 0.5
Correct B. 0.75
C. 0.25
D. 0.125

Correct Answer: B

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Question 22
In a study on the effect of temperature on the growth of E. coli, the following data were collected:
Correct A. The growth rate is directly proportional to the temperature.
B. The growth rate is inversely proportional to the temperature.
C. The growth rate is indep\endent of the temperature.
D. The growth rate is a quadratic function of the temperature.

Correct Answer: A

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Question 23
A geneticist is studying the inheri\tance of a particular trait in a population of mice. The trait is controlled by a \single gene with two alleles: A and a. The genotype and phenotype of the mice are as follows:
A. The trait is inherited in an autosomal dominant pattern.
Correct B. The trait is inherited in an autosomal recessive pattern.
C. The trait is inherited in a sex-linked pattern.
D. The trait is inherited in a polygenic pattern.

Correct Answer: B

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Question 24
A researcher is studying the effect of pH on the growth of a particular microorganism. The following data were collected:
A. The growth rate is directly proportional to the pH.
Correct B. The growth rate is inversely proportional to the pH.
C. The growth rate is indep\endent of the pH.
D. The growth rate is a quadratic function of the pH.

Correct Answer: B

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Question 25
A geneticist is studying the inheri\tance of a particular trait in a population of humans. The trait is controlled by a \single gene with two alleles: A and a. The genotype and phenotype of the individuals are as follows:
A. The trait is inherited in an autosomal dominant pattern.
Correct B. The trait is inherited in an autosomal recessive pattern.
C. The trait is inherited in a sex-linked pattern.
D. The trait is inherited in a polygenic pattern.

Correct Answer: B

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