POST UTME UNIBEN 2019 Biology | Objective

Are you preparing for POST UTME UNIBEN 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 a eukaryotic cell, what is the primary function of the Golgi apparatus?
A. Protein synthesis
B. Cell signaling
Correct C. Modification and transport of proteins and lipids
D. Cell division

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
A population of bacteria is growing exponentially. If the initial population is 100 cells and the population doubles every 2 hours, how many cells will be present after 6 hours?
A. 1000
B. 2000
C. 4000
Correct D. 8000

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. Cell wall
B. Cytoplasm
Correct C. Nucleus
D. Mitochondria

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
A species of bird has a beak length of 5 cm. If the beak length increases by 10% every generation, what will be the beak length of the bird's offspring after 5 generations?
A. 5.5
B. 6.1
C. 6.5
Correct D. 7.1

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
A diagram of a human eye is shown below. What is the function of the structure labeled 'B'?
A. Cornea
B. Iris
Correct C. Lens
D. Retina

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
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. 0.6
B. 0.4
C. 0.2
D. 0.8

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7
A researcher is studying the effect of pH on the activity of the enzyme catalase. If the enzyme is most active at a pH of 7.0, what can be concluded about the enzyme's optimal pH?
Correct A. The enzyme is most active at a pH of 7.0
B. The enzyme is most active at a pH of 5.0
C. The enzyme is most active at a pH of 9.0
D. The enzyme is most active at a pH of 10.0

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the plant is exposed to a light intensity of 200 μmol m-2 s-1, what is the plant's quantum yield?
Correct A. 0.05
B. 0.1
C. 0.2
D. 0.5

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9
A researcher is studying the effect of temperature on the growth rate of a microorganism. If the growth rate is 0.5 h-1 at 25°C, what is the growth rate at 30°C?
Correct A. 0.4
B. 0.5
C. 0.6
D. 0.7

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10
A plant has a stomatal density of 100 stomata cm-2. If the plant is exposed to a CO2 concentration of 400 ppm, what is the plant's stomatal conduc\tance?
Correct A. 4
B. 10
C. 20
D. 40

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11
In the xylem, what is the primary function of the tracheids?
Correct A. Transport of water and minerals from roots to leaves
B. Production of sugars through photosynthesis
C. Storage of nutrients and water in plants
D. Regulation of plant growth and development

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 12
What is the process by which plants release excess water through their leaves?
Correct A. Transpiration
B. Respiration
C. Photosynthesis
D. Osmoregulation

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13
In the human kidney, what is the primary function of the glomerulus?
Correct A. Filtering waste and excess fluids from the blood
B. Regulating blood pressure and electrolyte balance
C. Producing hormones that stimulate red blood cell production
D. Storing waste and excess fluids for excretion

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14
What is the term for the movement of molecules from an area of high concentration to an area of low concentration?
A. Osmosis
Correct B. Diffusion
C. Active transport
D. Passive transport

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 15
In the human respiratory system, what is the primary function of the alveoli?
Correct A. Exchange of oxygen and carbon dioxide between the lungs and the bloodstream
B. Production of mucus to trap dust and other particles
C. Regulation of breathing rate and depth
D. Storage of oxygen for later use

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16
The process of meiosis results in the production of four haploid daughter cells from a \single diploid parent cell. Which of the following is a characteristic of the daughter cells produced during meiosis?
A. They have the same number of chromosomes as the parent cell
Correct B. They have half the number of chromosomes as the parent cell
C. They have a mix of paternal and maternal chromosomes
D. They have a different number of chromosomes than the parent cell

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17
A diagram of a plant cell is shown below. Which of the following organelles is responsible for the breakdown of proteins?
A. Nucleus
B. Mitochondria
Correct C. Lysosome
D. Ribosome

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18
The human nervous system is responsible for controlling the body's movements, sensations, and functions. Which of the following is a type of neuron that plays a crucial role in the transmission of nerve impulses?
A. Motor neuron
B. Sensory neuron
Correct C. Interneuron
D. Glia cell

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 19
A diagram of the human digestive system is shown below. Which of the following organs is responsible for the breakdown of proteins into amino acids?
A. Mouth
B. Esophagus
Correct C. Stomach
D. Small intestine

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 20
The human body has a unique ability to adapt to changes in its environment. Which of the following is an example of a physio\logical adaptation?
A. Increased heart rate
B. Increased blood pressure
C. Increased body temperature
Correct D. Increased sweat rate

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21
In a study on the eco\logy of a freshwater lake, researchers found that the population of zooplankton increased by 25% in the presence of a certain species of algae. However, the population of zooplankton decreased by 15% in the presence of a different species of algae. Which of the following best describes the relationship between the two species of algae and the population of zooplankton?
Correct A. Competitive inhibition
B. Allosteric modulation
C. Heterotrophic interaction
D. Mutualism

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22
A researcher is studying the growth of a population of bacteria in a controlled environment. The population grows according to the equation (P(t) = 1000e^{kt}), where (P(t)) is the population at time (t) and (k) is a cons\tant. If the population doubles in 2 hours, what is the value of (k)?
A. 0.173
B. 0.346
Correct C. 0.692
D. 1.384

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23
A patient is diagnosed with a bacterial infection that is resis\tant to multiple antibiotics. The patient's doctor orders a series of tests to identify the type of bacteria and its antibiotic resis\tance profile. Which of the following tests would be most useful in identifying the type of bacteria?
A. Gram staining
Correct B. Molecular typing
C. Antibiotic susceptibility testing
D. Biochemical testing

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 24
A researcher is studying the structure of a protein u\sing X-ray crystal\lography. The protein has a molecular weight of 50,000 Da and a crystal lattice spacing of 2.5 Å. What is the resolution of the X-ray crystal\lography data?
Correct A. 1.25 Å
B. 2.5 Å
C. 5.0 Å
D. 10.0 Å

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25
A patient is diagnosed with a viral infection that is cau\sing a severe inflammatory response. The patient's doctor orders a series of tests to identify the type of virus and its replication cycle. Which of the following tests would be most useful in identifying the type of virus?
Correct A. PCR
B. ELISA
C. Western blot
D. Viral culture

Correct Answer: A

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