POST UTME LAUTECH 2021 Biology | Objective

Are you preparing for POST UTME LAUTECH exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2021 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
A. 200
Correct B. 400
C. 600
D. 800

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
A 2.5 L flask contains 2.0 g of CO2 at 25°C. What is the partial pressure of CO2 in the flask?
A. 0.5 atm
Correct B. 1.0 atm
C. 1.5 atm
D. 2.0 atm

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
Correct A. Nucleus
B. Mitochondria
C. Chloroplast
D. Vacuole

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
A 0.1 M solution of NaOH is prepared by dissolving 4 g of NaOH in water to make 1 L of solution. What is the pH of the solution?
A. 12
Correct B. 13
C. 14
D. 15

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
A diagram of a simple harmonic motion is shown below. Identify the part labeled 'B'.
A. Mass
Correct B. Spring
C. Damping
D. Energy

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 6
In a tropical rainforest, the nutrient cycle is primarily driven by the decomposition of organic matter by which of the following organisms?
A. Fungi
Correct B. Bacteria
C. Protozoa
D. Rotifers

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7
A 20-year-old male patient presents with symptoms of hypogonadism. Which of the following hormones is most likely to be deficient?
A. Insulin
B. Growth Hormone
Correct C. Testosterone
D. Adrenaline

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
In a typical human cell, the process of glycolysis occurs in the
A. Mitochondria
B. Endoplasmic Reticulum
C. Lysosomes
Correct D. Cytoplasm

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9
A 35-year-old female patient presents with symptoms of hyperthyroidism. Which of the following hormones is most likely to be overproduced?
Correct A. Thyroxine
B. Triiodothyronine
C. Adrenaline
D. Insulin

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10
In a typical human cell, the process of protein synthesis occurs in the
A. Mitochondria
B. Endoplasmic Reticulum
Correct C. Ribosomes
D. Lysosomes

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
Correct A. 0.4
B. 0.8
C. 1.6
D. 2.0

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 12
A researcher is studying the effect of pH on the growth of E. coli. The graph below shows the relationship between pH and growth rate.
A. The growth rate is highest at pH 7.
Correct B. The growth rate is highest at pH 5.
C. The growth rate is highest at pH 9.
D. The growth rate is highest at pH 3.

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13
A cell is placed in a solution with a concentration of 0.1 M glu\cose. If the cell is permeable to glu\cose, what is the concentration of glu\cose inside the cell after 10 minutes?
A. 0.001 M
B. 0.01 M
Correct C. 0.05 M
D. 0.1 M

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14
A population of rabbits is growing at a rate of 20% per year. If the initial population is 100, what is the population after 5 years?
A. 1000
B. 1200
Correct C. 1600
D. 2000

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 15
A researcher is studying the effect of temperature on the growth of bacteria. The graph below shows the relationship between temperature and growth rate.
A. The growth rate is highest at 30°C.
Correct B. The growth rate is highest at 40°C.
C. The growth rate is highest at 50°C.
D. The growth rate is highest at 60°C.

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16
The diagram below shows a cross-section of the human eye. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17
A cell is placed in a solution with a concentration of 0.1 M NaCl. If the cell membrane is selectively permeable to Na+ ions, what will happen to the cell?
Correct A. The cell will swell and eventually burst.
B. The cell will shrink and eventually die.
C. The cell will remain unchanged.
D. The cell will increase in size.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18
A population of bacteria is growing exponentially. If the initial population is 100 bacteria and the population doubles every 2 hours, what will be the population 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 19
A plant is placed in a solution with a concentration of 0.1 M KCl. If the plant is selectively permeable to K+ ions, what will happen to the plant?
Correct A. The plant will absorb water and swell.
B. The plant will lose water and shrink.
C. The plant will remain unchanged.
D. The plant will increase in size.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 20
A diagram of a plant cell is shown below. Which part of the cell is responsible for photosynthesis?
A. Vacuole
Correct B. Chloroplast
C. Nucleus
D. Cell wall

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'R'?
Correct A. 0.8
B. 0.6
C. 0.4
D. 0.2

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22
A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. If 1.0 mol of gas is added to the flask, what is the new pressure?
A. 2.5 atm
Correct B. 3.0 atm
C. 3.5 atm
D. 4.0 atm

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23
A plant cell has a vacuole that contains 0.5 M sucrose. If the cell membrane is permeable to sucrose, what is the concentration of sucrose in the cytosol?
A. 0.2 M
Correct B. 0.3 M
C. 0.4 M
D. 0.5 M

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 24
A 50 mL sample of blood is drawn from a patient and centrifuged. The resulting plasma has a pH of 7.4. What is the concentration of H+ ions in the plasma?
Correct A. 10^-7 M
B. 10^-8 M
C. 10^-9 M
D. 10^-10 M

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25
A 1.0 L flask contains 0.5 mol of an ideal gas at 25°C. If the gas is compressed to half its original volume, what is the new pressure?
A. 2.0 atm
B. 3.0 atm
Correct C. 4.0 atm
D. 5.0 atm

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