POST UTME NILE UNIVERSITY 2020 Biology | Objective
Practice these randomly selected questions to test your readiness.
Question 1
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
Question 2
A cell is placed in a solution with a concentration of 0.1 M glu\cose. What is the equilibrium concentration of glu\cose inside the cell?
Question 3
A person has a blood pressure of 120/80 mmHg. What is the systolic pressure?
Question 4
A microorganism that is capable of cau\sing disease in humans is known as a:
Question 5
A geneticist is studying the inheri\tance of a particular trait in a population of mice. The trait is determined by a \single gene with two alleles: B and b. The B allele is dominant and codes for the production of a protein that gives the mice a black coat color, while the b allele is recessive and codes for a protein that gives the mice a white coat color. What is the expected genotype and phenotype of a mouse that is homozygous recessive for the gene?
Question 6
The process by which plants release water vapor into the air is known as:
Question 7
In a forest e\cosystem, the presence of a keystone species can have a cascading effect on the entire food web. Which of the following species is most likely to be a keystone species?
Question 8
The process of mitosis in a eukaryotic cell involves the replication of DNA and the separation of chromosomes. What is the name of the stage in which the chromosomes are condensed and attached to the spindle fibers?
Question 9
A plant has a root system that is 50% efficient in absorbing water. If the plant requires 100 mL of water per day, how much water will it absorb from the soil?
Question 10
A 0.5 M solution of NaOH is prepared by dissolving 40 grams of NaOH in 1000 mL of water. What is the pH of the solution?
Question 11
A population of rabbits is growing according to the \logistic growth model. If the initial population size is 100 and the carrying capacity is 1000, what is the population size after 5 generations?
Question 12
A diagram of the human brain is shown below. What is the function of the cerebellum?
Question 13
The process of mitosis is a type of cell division that results in two daughter cells that are genetically identical to the parent cell. Which of the following stages of mitosis is responsible for the separation of chromosomes?
Question 14
A patient has a tumor in the pancreas that is producing excess insulin. What is the name of the hormone that is being overproduced?
Question 15
The process of digestion in the human body involves the breakdown of complex molecules into simpler ones. Which of the following enzymes plays a key role in this process?
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