POST UTME EKSU 2019 Biology | Objective

Are you preparing for POST UTME EKSU exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2019 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
Correct B. To pump protons across the mitochondrial inner membrane
C. To reduce NADH and FADH2 to NAD+ and FAD
D. To produce water and carbon dioxide as byproducts

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell's turgor pressure?
A. It will decrease due to water loss
B. It will remain the same
Correct C. It will increase due to water uptake
D. It will decrease due to cell lysis

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
In the context of mitosis, what is the primary function of the spindle fibers?
A. To separate the sister chromatids
B. To align the chromosomes at the metaphase plate
Correct C. To pull the chromosomes apart during anaphase
D. To form the nuclear envelope during telophase

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
A diagram of the human respiratory system is shown below.
A. The trachea is responsible for gas exchange
B. The diaphragm is responsible for gas exchange
C. The lungs are responsible for gas exchange
Correct D. The trachea is responsible for transporting air to the lungs

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
A diagram of the human circulatory system is shown below.
A. The heart is responsible for pumping blood to the lungs
Correct B. The heart is responsible for pumping blood to the body
C. The arteries are responsible for transporting oxygenated blood
D. The veins are responsible for transporting deoxygenated blood

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 6
The process of osmoregulation in plants involves the movement of water across the plasma membrane. Which of the following is a key player in this process?
Correct A. Aquaporins
B. Proton pumps
C. ATPases
D. Ion channels

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7
In the context of population eco\logy, what is the term for the rate at which a population grows or declines?
Correct A. Intrinsic rate of increase
B. Carrying capacity
C. Environmental resis\tance
D. Population density

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
The diagram below represents a cross-section of a plant root. Identify the structure labeled A.
Correct A. Root hair cell
B. Xylem vessel
C. Phloem sieve cell
D. Epidermal cell

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9
The following graph represents the growth of a population over time. What is the term for the point at which the population reaches its maximum size?
Correct A. Carrying capacity
B. Intrinsic rate of increase
C. Environmental resis\tance
D. Population density

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10
The following equation represents the relationship between the concentration of a substrate and the rate of enzyme activity. What is the term for the cons\tant of proportionality?
Correct A. Michaelis cons\tant
B. Enzyme concentration
C. Substrate concentration
D. Rate of reaction

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11
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 Δπηελοσες (Δπηελοσες) complex. What is the primary function of the Δπηελοσες complex in this process?
A. To bind to the centromere and initiate sister chromatid separation
Correct B. To activate the anaphase-promoting complex (APC) and initiate the degradation of cyclin B
C. To phosphorylate and inactivate the kinase activity of the cyclin-dep\endent kinase (CDK)
D. To bind to the kinetochore and initiate the attachment of microtubules to the sister chromatids

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 12
A plant cell is placed in a solution containing 0.1 M glu\cose. The cell membrane is permeable to glu\cose, but not to other solutes. What will happen to the concentration of glu\cose inside the cell?
Correct A. The concentration of glu\cose will increase inside the cell
B. The concentration of glu\cose will decrease inside the cell
C. The concentration of glu\cose will remain the same inside the cell
D. The concentration of glu\cose will increase outside the cell

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13
A population of bacteria is growing in a culture medium. The growth rate of the population is proportional to the product of the current population size and the amount of available nutrients. If the initial population size is 100 bacteria and the amount of available nutrients is 10 units, what will be the population size after 5 generations?
A. 500 bacteria
B. 1000 bacteria
Correct C. 2000 bacteria
D. 5000 bacteria

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
Correct A. To store water and salts
B. To synthesize proteins
C. To generate energy through cellular respiration
D. To carry out photosynthesis

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 15
A diagram of a human eye is shown below. What is the function of the structure labeled 'Y'?
A. To focus light onto the retina
B. To regulate the amount of light entering the eye
Correct C. To transmit visual signals to the brain
D. To produce tears to lubricate the eye

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16
In the process of cellular respiration, what is the primary function of the mitochondria?
Correct A. To synthesize ATP from ADP and Pi
B. To break down glu\cose into pyruvate
C. To transport electrons from NADH to oxygen
D. To synthesize fatty acids from acetyl-CoA

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17
Asexual reproduction in plants can occur through the production of
A. seeds
Correct B. spores
C. bulbs
D. tubers

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18
The xylem in plants is responsible for transporting
Correct A. water and minerals from the roots to the leaves
B. sugars and amino acids from the leaves to the roots
C. hormones and other signaling molecules throughout the plant
D. waste products from the leaves to the roots

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 19
The bacterium Escherichia coli (E. coli) is a common cause of
A. urinary tract infections
Correct B. gastroenteritis
C. pneumonia
D. meningitis

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 20
The process of mitosis results in the production of
Correct A. two daughter cells with the same number of chromosomes as the parent cell
B. four daughter cells with half the number of chromosomes as the parent cell
C. two daughter cells with a mix of chromosomes from the parent cell
D. no daughter cells at all

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21
In a population of 1000 individuals, 20% are heterozygous for the gene controlling the flower color. If 10% of the population is homozygous recessive, what is the frequency of the dominant allele?
A. 0.3
B. 0.4
Correct C. 0.5
D. 0.6

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22
A 2.5 cm long xylem vessel has a diameter of 0.5 mm. If the vessel is filled with water at 20°C, what is the pressure exerted by the water column?
A. 1000 Pa
B. 2000 Pa
Correct C. 3000 Pa
D. 4000 Pa

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23
A species of plant has a growth rate of 20% per day. If the initial population is 1000 individuals, how many individuals will be present after 5 days?
A. 10000
B. 20000
C. 30000
Correct D. 40000

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 24
A population of 500 individuals is divided into 5 equal groups. If 20% of the individuals in each group are heterozygous for the gene controlling the flower color, what is the frequency of the dominant allele?
A. 0.2
B. 0.3
Correct C. 0.4
D. 0.5

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25
A 10 cm long xylem vessel has a diameter of 1 mm. If the vessel is filled with water at 20°C, what is the pressure exerted by the water column?
A. 5000 Pa
B. 6000 Pa
Correct C. 7000 Pa
D. 8000 Pa

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub:
Chat with Support