POST UTME UNIPORT 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a population of 1000 individuals, 20% are homozygous dominant (BB), 40% are heterozygous (Bb), and 40% are homozygous recessive (bb). If a random sample of 10 individuals is taken, what is the probability that at least 2 of them are homozygous dominant?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 2
In a population of 1000 individuals, 70% are heterozygous for a particular gene. What is the frequency of the recessive allele in this population?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 3
A patient has a blood glu\cose level of 120 mg/dL. If the patient's blood volume is 5 L, what is the total amount of glu\cose in the blood in milligrams?
A. 600 mg
B. 800 mg
C. 1000 mg
D. 1200 mg
Question 4
A 2.5 L flask contains a mixture of O2 and N2 gases at a total pressure of 2.0 atm. If the partial pressure of O2 is 0.8 atm, what is the mole \fraction of O2 in the mixture?
A. 0.4
B. 0.5
C. 0.6
D. 0.7
Question 5
A plant cell has a vacuole that contains 0.5 M sucrose. If the cell membrane is permeable to sucrose, what will be the concentration of sucrose in the cytoplasm after 30 minutes?
A. 0.2 M
B. 0.3 M
C. 0.4 M
D. 0.5 M
Question 6
A 5-year-old child is diagnosed with a rare genetic disorder that affects the production of a specific enzyme. The child's parents are both carriers of the recessive allele. What is the probability that their next child will be affected by the disorder?
A. 1/4
B. 1/2
C. 3/4
D. 1
Question 7
In a study on the effects of light intensity on photosynthesis, researchers measured the rate of photosynthesis in a sample of spinach leaves at different light intensities. The data is presented in the table below. What is the rate of photosynthesis at a light intensity of 500 μmol/m²s?
A. 10 μmol CO2/m²s
B. 20 μmol CO2/m²s
C. 30 μmol CO2/m²s
D. 40 μmol CO2/m²s
Question 8
A cell undergoing mitosis has a chromosome number of 46. What is the ploidy level of this cell?
A. Diploid
B. Haploid
C. Triploid
D. Tetraploid
Question 9
The process of mitosis in eukaryotic cells involves the replication of DNA and the separation of chromosomes. Which of the following best describes the order of events during mitosis?
A. Prophase, metaphase, anaphase, telophase, cytokinesis
B. Prophase, anaphase, metaphase, telophase, cytokinesis
C. Metaphase, prophase, anaphase, telophase, cytokinesis
D. Telophase, metaphase, anaphase, prophase, cytokinesis
Question 10
In the human eye, light enters through the cornea and is focused by the lens onto the retina. What is the primary function of the retina?
A. To detect light and convert it into electrical signals
B. To focus light onto the retina
C. To regulate the amount of light entering the eye
D. To produce tears to lubricate the eye
Question 11
A 35-year-old man is diagnosed with type 2 diabetes mellitus. His fasting blood glu\cose level is 250mg/dL. Which of the following is the most appropriate treatment for his condition?
A. Metformin
B. Sulfonylureas
C. Insulin therapy
D. Pioglitazone
Question 12
A 25-year-old woman presents with symptoms of anemia. Her hemoglobin level is 8g/dL. Which of the following is the most likely cause of her anemia?
A. Iron deficiency anemia
B. Vitamin B12 deficiency anemia
C. Folate deficiency anemia
D. Sickle cell anemia
Question 13
The process of natural selection involves the adaptation of organisms to their environment. Which of the following best describes the mechanism of natural selection?
A. The survival and reproduction of organisms that are best adapted to their environment.
B. The death and extinction of organisms that are poorly adapted to their environment.
C. The mutation of genes that result in the adaptation of organisms to their environment.
D. The migration of organisms from one environment to another.
Question 14
A cell has a nucleus with a diameter of 10 μm. If the nucleus is spherical, what is the volume of the nucleus?
A. 1000 μm^3
B. 2000 μm^3
C. 3000 μm^3
D. 4000 μm^3
Question 15
In a photosynthetic pathway, which of the following is the primary acceptor of electrons in the light-dep\endent reactions?
A. P680
B. P700
C. Plastocyanin
D. Ferredoxin

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: