POST UTME REDEEMERS UNIVERSITY 2018 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. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. Large population size
C. No mutation
Correct D. No gene flow

Correct Answer: D

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Question 2
The process of mitosis is a type of cell division that results in two daughter cells that are genetically identical to the parent cell. Which of the following stages of mitosis is characterized by the condensation of chromatin into visible chromosomes?
Correct A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: A

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Question 3
The excretory system of the human body is responsible for removing waste products from the body. Which of the following organs is responsible for filtering waste from the blood?
Correct A. Kidneys
B. Liver
C. Lungs
D. Skin

Correct Answer: A

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Question 4
The nervous system of the human body is responsible for transmitting and proces\sing information. Which of the following types of neurons is responsible for transmitting signals from sensory receptors to the central nervous system?
Correct A. Sensory neurons
B. Motor neurons
C. Interneurons
D. Association neurons

Correct Answer: A

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Question 5
The circulatory system of the human body is responsible for transporting oxygen and nutrients to cells and removing waste products. Which of the following blood vessels is responsible for carrying oxygenated blood from the lungs to the heart?
A. Pulmonary artery
Correct B. Pulmonary vein
C. Aorta
D. Vena cava

Correct Answer: B

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Question 6
In a tropical rainforest, the primary consumers are primarily herbivores that feed on the primary producers. Which of the following is a characteristic of these primary consumers?
A. They have a large body size
B. They have a short digestive tract
Correct C. They have a high metabolic rate
D. They have a low reproductive rate

Correct Answer: C

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Question 7
The xylem in plants is responsible for transporting water and minerals from the roots to the leaves. Which of the following is a characteristic of xylem tissue?
Correct A. It is composed of dead cells
B. It is composed of living cells
C. It has a high water content
D. It has a low water content

Correct Answer: A

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Question 8
In the process of photosynthesis, plants convert light energy into chemical energy in the form of glu\cose. Which of the following is a byproduct of photosynthesis?
Correct A. Oxygen
B. Carbon dioxide
C. Water
D. Nitrogen

Correct Answer: A

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Question 9
The cell cycle is the process by which a cell grows, replicates its DNA, and divides into two daughter cells. Which of the following stages of the cell cycle is responsible for DNA replication?
A. G1
Correct B. S
C. G2
D. M

Correct Answer: B

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Question 10
The human body has a unique system for transporting oxygen and nutrients to cells and removing waste products. Which of the following is a characteristic of the circulatory system?
Correct A. It is composed of a network of blood vessels
B. It is composed of a network of lymph vessels
C. It is responsible for transporting oxygen and nutrients to cells
D. It is responsible for removing waste products from cells

Correct Answer: A

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Question 11
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. Regulation of body temperature
B. Control of hunger and thirst
C. Maintenance of blood pressure
Correct D. Regulation of hormone secretion

Correct Answer: D

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Question 12
A population of Drosophila melanogaster is being studied for its evolutionary adaptations. Which of the following traits would be an example of a neutral mutation?
A. Increased wing length
B. Resis\tance to a pesticide
Correct C. Altered eye color
D. Increased body size

Correct Answer: C

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Question 13
A diagram of a plant cell is shown below. What is the function of the cell wall?
Correct A. Provides structural support
B. Regulates the movement of materials in and out of the cell
C. Involved in photosynthesis
D. Stores genetic information

Correct Answer: A

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Question 14
A genetic cross is performed between two pea plants, one with the genotype TT and the other with the genotype tt. What is the expected genotype of the offspring?
Correct A. Tt
B. TT
C. tt
D. All of the above

Correct Answer: A

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Question 15
A diagram of the human respiratory system is shown below. What is the primary function of the alveoli?
Correct A. Exchange of oxygen and carbon dioxide
B. Regulation of body temperature
C. Maintenance of blood pressure
D. Production of red blood cells

Correct Answer: A

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Question 16
In the context of osmoregulation, what is the primary function of the kidneys in a desert-dwelling organism?
Correct A. To concentrate urine to conserve water
B. To dilute urine to excrete excess salt
C. To regulate body temperature
D. To maintain acid-base balance

Correct Answer: A

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Question 17
A diagram of the human eye is shown below. Which part of the eye is responsible for adjusting the size of the pupil?
A. A
B. B
Correct C. C
D. D

Correct Answer: C

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Question 18
In a population of rabbits, the average height is 20 cm with a s\tandard deviation of 2 cm. If a random sample of 10 rabbits is taken, what is the probability that the sample mean height will be greater than 22 cm?
A. 0.05
B. 0.10
C. 0.25
Correct D. 0.50

Correct Answer: D

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Question 19
A diagram of a plant cell is shown below. Which part of the cell is responsible for photosynthesis?
A. A
Correct B. B
C. C
D. D

Correct Answer: B

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Question 20
A diagram of a simple harmonic motion is shown below. What is the amplitude of the motion?
A. 10 N
B. 20 N
Correct C. 30 N
D. 40 N

Correct Answer: C

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Question 21
A population of Drosophila melanogaster is maintained in a laboratory. The population size is 1000 individuals and the sex ratio is 1:1. The population is allowed to grow for 10 generations, with a 20% increase in population size each generation. What is the expected population size after 10 generations?
Correct A. 16200
B. 12960
C. 10800
D. 9000

Correct Answer: A

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Question 22
A 5-year-old child is brought to the hospital with a history of recurrent infections. The child's parents are first cou\sins. What is the most likely genetic disorder responsible for this child's condition?
Correct A. Cystic fibrosis
B. Sickle cell anemia
C. Thalassemia
D. Tay-Sachs disease

Correct Answer: A

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Question 23
A researcher is studying the effect of pH on the growth of E. coli. The researcher sets up an experiment with three different pH levels: 4, 7, and 10. The results are shown in the table below. What is the most likely explanation for the observed growth patterns?
A. The bacteria are more likely to grow in a neutral pH environment.
B. The bacteria are more likely to grow in an acidic pH environment.
C. The bacteria are more likely to grow in an alkaline pH environment.
Correct D. The bacteria are more likely to grow in a pH environment that is close to their optimal pH.

Correct Answer: D

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Question 24
A 30-year-old woman presents to the emergency department with a 2-day history of severe abdominal pain. She has a history of multiple sexual partners and has been u\sing condoms inconsistently. What is the most likely diagnosis?
A. Ectopic pregnancy
B. Ovarian torsion
C. App\endicitis
Correct D. Pelvic inflammatory disease (PID)

Correct Answer: D

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Question 25
A 40-year-old man presents to the doctor with a 10-year history of progressive hearing loss. He has a family history of hearing loss. What is the most likely genetic disorder responsible for this man's condition?
A. Werner syndrome
B. Ataxia-telangiectasia
C. Friedreich's ataxia
Correct D. Nonsyndromic hearing loss

Correct Answer: D

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