POST UTME DELSU 2024 Biology | Objective

Are you preparing for POST UTME DELSU exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2024 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In the context of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
B. To produce NADH and FADH2
Correct C. To pump protons across the mitochondrial membrane
D. To reduce oxygen to water

Correct Answer: C

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Question 2
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. To synthesize proteins
Correct B. To store genetic information
C. To regulate cell growth
D. To transport materials across the cell membrane

Correct Answer: B

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Question 3
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 20% per hour, what will be the population size after 3 hours?
A. 1000
B. 2000
Correct C. 4000
D. 8000

Correct Answer: C

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Question 4
A diagram of a simple circuit is shown below. What is the current flowing through the 2-ohm resistor?
A. 0.5 A
Correct B. 1 A
C. 2 A
D. 4 A

Correct Answer: B

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Question 5
A species of bird has a beak length of 5 cm. If the beak length increases by 10% per generation, what will be the beak length of the bird's offspring?
A. 4.5 cm
Correct B. 5.5 cm
C. 6 cm
D. 6.5 cm

Correct Answer: B

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Question 6
In a population of 1000 individuals, 70% have the dominant allele for brown eyes (B) and 30% have the recessive allele for blue eyes (b). If two individuals with brown eyes are randomly selected for a study, what is the probability that they are both homozygous dominant (BB) for eye color?
A. 0.49
B. 0.51
Correct C. 0.67
D. 0.75

Correct Answer: C

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Question 7
A researcher is studying the effect of pH on the growth of E. coli bacteria. The researcher measures the growth rate of the bacteria at different pH levels and plots the data on a graph. If the graph shows a sigmoidal curve with a maximum growth rate at pH 7, what is the most likely explanation for this observation?
A. The bacteria are more resis\tant to acidic environments.
B. The bacteria are more resis\tant to basic environments.
C. The bacteria have an optimal growth rate at pH 7.
Correct D. The bacteria have a maximum growth rate at pH 7.

Correct Answer: D

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Question 8
A 2-year-old child is diagnosed with a genetic disorder that causes an inability to break down certain amino acids. The child's parents are both carriers of the recessive allele for this disorder. What is the probability that their next child will be affected by the disorder?
A. 0.25
Correct B. 0.50
C. 0.75
D. 0.90

Correct Answer: B

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Question 9
A researcher is studying the effect of temperature on the rate of respiration in yeast cells. The researcher measures the rate of respiration at different temperatures and plots the data on a graph. If the graph shows a linear relationship between temperature and respiration rate, what is the most likely explanation for this observation?
A. The yeast cells are more active at higher temperatures.
Correct B. The yeast cells have a higher metabolic rate at higher temperatures.
C. The yeast cells have a lower metabolic rate at higher temperatures.
D. The yeast cells are more resis\tant to heat stress.

Correct Answer: B

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Question 10
A 5-year-old child is diagnosed with a genetic disorder that causes an inability to break down certain carbohydrates. The child's parents are both carriers of the recessive allele for this disorder. What is the probability that their next child will be affected by the disorder?
A. 0.25
Correct B. 0.50
C. 0.75
D. 0.90

Correct Answer: B

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Question 11
In a closed e\cosystem, what is the primary mechanism by which energy is transferred from one trophic level to the next?
Correct A. Decomposition
B. Herbivory
C. Omnivory
D. Detritivory

Correct Answer: A

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Question 12
A cell undergoing mitosis has a nucleus with 4 chromosomes. How many chromosomes will be present in each daughter cell after mitosis?
A. 2
Correct B. 4
C. 6
D. 8

Correct Answer: B

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Question 13
In the process of diffusion, what is the driving force behind the movement of molecules from an area of high concentration to an area of low concentration?
A. Osmosis
B. Active transport
Correct C. Passive transport
D. Brownian motion

Correct Answer: C

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Question 14
A plant has a root system with a high concentration of xylem tissue. What is the primary function of this tissue?
Correct A. Transport of water and minerals from the roots to the leaves
B. Transport of sugars and amino acids from the leaves to the roots
C. Storage of water and nutrients in the roots
D. Absorption of water and nutrients from the soil

Correct Answer: A

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Question 15
A population of rabbits is growing exponentially. If the initial population size is 100 and the growth rate is 0.2 per year, what will be the population size after 5 years?
A. 1000
B. 2000
C. 4000
Correct D. 8000

Correct Answer: D

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Question 16
In the context of respiration, what is the primary function of the mitochondria in the process of cellular respiration?
A. To generate ATP through substrate-level phosphorylation
Correct B. To generate ATP through oxidative phosphorylation
C. To break down glu\cose to pyruvate
D. To synthesize glu\cose from pyruvate

Correct Answer: B

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Question 17
What is the primary function of the olfactory epithelium in the nasal cavity?
A. To produce mucus that traps dust and other particles
B. To produce cilia that move mucus and trapped particles towards the pharynx
Correct C. To detect odorant molecules and transmit signals to the brain
D. To produce tears that lubricate the eyes

Correct Answer: C

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Question 18
In the context of excretion, what is the primary function of the kidneys?
A. To regulate blood pressure through the renin-angioten\sin-aldosterone system
Correct B. To regulate electrolyte balance through the reabsorption and secretion of ions
C. To regulate acid-base balance through the reabsorption and secretion of hydrogen ions
D. To regulate water balance through the reabsorption and secretion of water

Correct Answer: B

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Question 19
What is the primary function of the epidermis in the skin?
A. To produce sweat that helps to regulate body temperature
B. To produce sebum that helps to lubricate the skin
C. To produce melanin that helps to protect the skin from UV radiation
Correct D. To produce keratin that helps to strengthen the skin

Correct Answer: D

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Question 20
In the context of genetics, what is the primary function of the centrioles in the cell?
Correct A. To form the spindle fibers that separate chromosomes during cell division
B. To form the cilia that move mucus and trapped particles towards the pharynx
C. To form the flagella that propel sperm cells
D. To form the microtubules that provide structural support to the cell

Correct Answer: A

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Question 21
In a closed e\cosystem, the rate of photosynthesis is directly proportional to the concentration of CO2 and inversely proportional to the concentration of O2. If the concentration of CO2 is doubled and the concentration of O2 is halved, what is the effect on the rate of photosynthesis?
A. The rate of photosynthesis is doubled
B. The rate of photosynthesis is halved
Correct C. The rate of photosynthesis remains unchanged
D. The rate of photosynthesis is quadrupled

Correct Answer: C

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Question 22
A 2-year-old child is fed a diet rich in protein and fat. Which of the following is a likely consequence of this diet?
A. The child will experience weight loss
Correct B. The child will experience weight gain
C. The child's growth rate will increase
D. The child's growth rate will decrease

Correct Answer: B

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Question 23
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
Correct A. To focus light on the retina
B. To re\fract light entering the eye
C. To detect changes in light intensity
D. To regulate the amount of light entering the eye

Correct Answer: A

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Question 24
A 5-year-old child is experiencing a high fever and is vomiting. Which of the following is a likely cause of this condition?
Correct A. A viral infection
B. A bacterial infection
C. A parasitic infection
D. A fungal infection

Correct Answer: A

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Question 25
A diagram of the human kidney is shown below. What is the function of the part labeled 'B'?
Correct A. To filter waste from the blood
B. To regulate the amount of water in the body
C. To produce hormones that regulate blood pressure
D. To regulate the amount of electrolytes in the body

Correct Answer: A

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