Practice post utme bowen university biology 2022 Past Questions

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. 0.16

B. 0.24

C. 0.32

D. 0.4

Correct Answer: A

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Question 2

A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. Calculate the pressure of the gas u\sing the ideal gas law.

Correct A. 1.01 × 10^5 Pa

B. 2.02 × 10^5 Pa

C. 3.03 × 10^5 Pa

D. 4.04 × 10^5 Pa

Correct Answer: A

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Question 3

A plant cell has a vacuole with a volume of 100 μm^3. If the osmotic pressure of the solution inside the vacuole is 1.5 atm, what is the concentration of the solute?

Correct A. 0.1 M

B. 0.2 M

C. 0.3 M

D. 0.4 M

Correct Answer: A

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Question 4

A 50-year-old man has a blood pressure of 140/90 mmHg. If his cardiac output is 5 L/min, what is his peripheral resis\tance?

Correct A. 1000 dyn·s/cm^5

B. 2000 dyn·s/cm^5

C. 3000 dyn·s/cm^5

D. 4000 dyn·s/cm^5

Correct Answer: A

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Question 5

A 20-year-old woman has a body mass index (BMI) of 25. If her height is 160 cm, what is her weight?

A. 50 kg

B. 60 kg

Correct C. 70 kg

D. 80 kg

Correct Answer: C

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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. 0.36

B. 0.64

C. 0.72

D. 0.84

Correct Answer: A

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Question 7

A 2.5 L flask contains 0.5 M NaOH. If 25 mL of 0.5 M HCl is slowly added to the flask, what is the resulting concentration of the solution?

Correct A. 0.4 M

B. 0.5 M

C. 0.6 M

D. 0.7 M

Correct Answer: A

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Question 8

A 50-year-old male patient presents with symptoms of chronic kidney disease. His serum creatinine level is 2.5 mg/dL. What is the estimated glomerular filtration rate (eGFR) of this patient?

A. 15 mL/min/1.73 m^2

Correct B. 30 mL/min/1.73 m^2

C. 45 mL/min/1.73 m^2

D. 60 mL/min/1.73 m^2

Correct Answer: B

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Question 9

A researcher wants to study the effect of temperature on the growth rate of E. coli. She sets up an experiment with three different temperatures: 25°C, 30°C, and 35°C. What type of experimental design is this?

Correct A. Controlled experiment

B. Quasi-experiment

C. Correlational study

D. Survey study

Correct Answer: A

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Question 10

A 30-year-old female patient presents with symptoms of infertility. Her husband has a normal semen analysis. What is the next step in the evaluation of this patient?

Correct A. Hysterosalpingogram (HSG)

B. Laparoscopy

C. In vitro fertilization (IVF)

D. Endometrial biopsy

Correct Answer: A

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Question 11

A study on the genetic basis of height in humans found that the height of an individual is influenced by multiple genes. If the height of a parent is 180 cm and the height of their child is 160 cm, what is the probability that the child inherited the gene for tallness from the parent?

A. 0.5

Correct B. 0.25

C. 0.75

D. 0.33

Correct Answer: B

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Question 12

A population of bacteria is growing exponentially. If the initial population is 1000 and the growth rate is 2% per hour, what is the population after 5 hours?

A. 1000

B. 1200

C. 1300

Correct D. 1400

Correct Answer: D

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Question 13

A diagram of the human respiratory system is shown below. What is the function of the alveoli?

Correct A. Gas exchange

B. Oxygen transport

C. Carbon dioxide removal

D. Respiratory rhythm regulation

Correct Answer: A

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Question 14

A diagram of the human nervous system is shown below. What is the function of the cerebellum?

Correct A. Motor control

B. Sensory proces\sing

C. Cognitive function

D. Emotional regulation

Correct Answer: A

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Question 15

A diagram of the human excretory system is shown below. What is the function of the kidneys?

Correct A. Waste removal

B. Electrolyte regulation

C. Fluid balance

D. pH regulation

Correct Answer: A

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Question 16

The Hardy-Weinberg principle states that the frequency of alleles in a population will remain cons\tant from generation to generation if five certain conditions are met. Which of the following is NOT one of these conditions?

Correct A. Large population size

B. Random mating

C. No mutation

D. No gene flow

Correct Answer: A

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Question 17

In a eukaryotic cell, the process of mitosis results in the production of daughter cells that are genetically identical to the parent cell. Which of the following stages of mitosis is responsible for the separation of sister chromatids?

A. Prophase

B. Metaphase

Correct C. Anaphase

D. Telophase

Correct Answer: C

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Question 18

The process of photosynthesis in plants involves the conversion of light energy into chemical energy. Which of the following is a byproduct of photosynthesis?

Correct A. Oxygen

B. Carbon dioxide

C. Water

D. Glu\cose

Correct Answer: A

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Question 19

The process of cellular respiration in cells involves the breakdown of glu\cose to produce energy. Which of the following is a stage of cellular respiration?

A. Glycolysis

B. Citric acid cycle

Correct C. Electron transport chain

D. Fermentation

Correct Answer: C

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Question 20

The process of diffusion in cells involves the movement of molecules from an area of high concentration to an area of low concentration. Which of the following is a type of diffusion?

Correct A. Passive diffusion

B. Active transport

C. Osmosis

D. Facilitated diffusion

Correct Answer: A

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Question 21

In a tropical rainforest e\cosystem, the primary producers are mainly composed of which of the following plant species?

Correct A. C3 plants

B. C4 plants

C. CAM plants

D. Algae

Correct Answer: A

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Question 22

The process by which cells divide to produce two daughter cells with the same number of chromosomes as the parent cell is called?

Correct A. Mitosis

B. Meiosis

C. Binary fission

D. Endoreduplication

Correct Answer: A

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Question 23

The xylem tissue in plants is responsible for transporting?

Correct A. Water and minerals

B. Sugars and amino acids

C. Hormones and waste products

D. Oxygen and carbon dioxide

Correct Answer: A

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Question 24

The nervous system in animals is responsible for?

A. Regulating body temperature

B. Controlling movement

Correct C. Proces\sing and transmitting information

D. Producing hormones

Correct Answer: C

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Question 25

The hormone insulin is produced by which of the following glands?

A. Pituitary gland

B. Thyroid gland

Correct C. Pancreas

D. Adrenal gland

Correct Answer: C

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