POST UTME RHEMA UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The type of coordination in which the \endocrine system produces hormones that regulate various bodily functions is known as
A. Nervous Coordination
B. Hormonal Coordination
C. Muscular Coordination
D. Skeletal Coordination
Question 2
What is the term for the process by which an organism's genetic makeup changes over time due to environmental pressures?
A. Natural selection
B. Genetic drift
C. Mutation
D. Gene flow
Question 3
A cell is placed in a solution with a high concentration of salt. What happens to the cell?
A. The cell shrinks due to water loss.
B. The cell swells due to water gain.
C. The cell remains unchanged.
D. The cell bursts due to osmotic pressure.
Question 4
A 50 μg sample of DNA is digested with a restriction enzyme that cuts the DNA into fragments of 200, 300, and 400 base pairs. What is the total length of the DNA fragments?
A. 900 bp
B. 1000 bp
C. 1100 bp
D. 1200 bp
Question 5
A 10 μL sample of a 0.5 M solution of glu\cose is injected into a chromatography column. If the retention time is 5 minutes, what is the concentration of glu\cose in the column?
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M
Question 6
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells is known as
A. Mitosis
B. Meiosis
C. Binary Fission
D. Endoreduplication
Question 7
In the process of osmoregulation, which of the following is a key mechanism used by the kidney to regulate the concentration of ions in the blood?
A. Reabsorption of ions from the filtrate
B. Secretion of ions into the filtrate
C. Regulation of ion channels in the renal tubules
D. Excretion of excess ions in the urine
Question 8
A 2.5 L solution of 0.1 M NaCl is diluted to 5 L. What is the new concentration of NaCl?
A. 0.05 M
B. 0.1 M
C. 0.2 M
D. 0.3 M
Question 9
A diagram of a plant's xylem and phloem is shown below. Which of the following statements is true about the xylem?
A. The xylem transports water and minerals from the roots to the leaves.
B. The xylem transports sugars and other organic compounds from the leaves to the roots.
C. The xylem is responsible for gas exchange between the plant and the atmosphere.
D. The xylem is a type of connective tissue found in animals.
Question 10
A plant grows in a pot with a mixture of soil and sand. If the plant grows 10 cm in 5 days, what is the rate of growth?
A. 2 cm/day
B. 5 cm/day
C. 10 cm/day
D. 20 cm/day
Question 11
A solution of 0.1 M glu\cose is diluted to 0.01 M. What is the new volume of the solution?
A. 10 mL
B. 100 mL
C. 1000 mL
D. 10 L
Question 12
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'?
A. 0.36
B. 0.64
C. 0.72
D. 0.84
Question 13
A diagram of a plant cell is shown below. Identify the part labeled 'X'.
A. Vacuole
B. Mitochondrion
C. Nucleus
D. Plastid
Question 14
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'?
A. 0.36
B. 0.64
C. 0.68
D. 0.72
Question 15
In the xylem, what is the primary mechanism for the transport of water and minerals from the roots to the leaves?
A. Transpiration pull
B. Root pressure
C. Capillary action
D. Osmosis

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