POST UTME LAUTECH 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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
B. 1.0 atm
C. 1.5 atm
D. 2.0 atm
Question 2
A diagram of the xylem tissue in a plant is shown below. What is the primary function of the tracheids in this tissue?
A. Transport of water and minerals
B. Storage of nutrients
C. Support of the plant
D. Protection from pathogens
Question 3
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?
A. 10^-7 M
B. 10^-8 M
C. 10^-9 M
D. 10^-10 M
Question 4
A diagram of a simple harmonic motion is shown below. Identify the part labeled 'B'.
A. Mass
B. Spring
C. Damping
D. Energy
Question 5
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?
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.
Question 6
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
C. Retina
D. Lens
Question 7
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'?
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Question 8
A 40-year-old male presents with a 5-year history of hypertension. His medical history includes a previous myocardial infarction. Which of the following is the most likely underlying cause of his hypertension?
A. Renal artery stenosis
B. Coarctation of the aorta
C. Primary aldosteronism
D. Pheochromocytoma
Question 9
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.
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.
Question 10
In a typical human cell, the process of protein synthesis occurs in the
A. Mitochondria
B. Endoplasmic Reticulum
C. Ribosomes
D. Lysosomes
Question 11
The classification of living things is based on
A. Cell structure
B. Morpho\logy
C. Metabolism
D. Evolutionary relationships
Question 12
A 25-year-old male presents with a 2-year history of infertility. His semen analysis shows a low sperm count and abnormal morpho\logy. Which of the following is the most likely cause of his infertility?
A. Varicocele
B. Cryptorchidism
C. Klinefelter syndrome
D. Sperm antibodies
Question 13
The process of growth and development in living organisms is regulated by
A. Hormones
B. Growth factors
C. Nutrients
D. Genes
Question 14
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?
A. 0.4
B. 0.8
C. 1.6
D. 2.0
Question 15
A 35-year-old female presents with a 3-year history of recurrent kidney stones. Her medical history includes a previous kidney stone that was composed of calcium oxalate. Which of the following is the most likely underlying cause of her condition?
A. Hyperparathyroidism
B. Cystinuria
C. Gout
D. Sarcoidosis

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: