POST UTME UNN 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a plant cell is shown below. Which of the following organelles is responsible for protein synthesis?
A. Nucleus
B. Mitochondria
C. Ribosomes
D. Lysosomes
Question 2
The diagram below shows the life cycle of a what type of organism?
A. Bacteria
B. Fungus
C. Protozoa
D. Virus
Question 3
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
A. Storage of water and minerals
B. Transport of sugars and other organic compounds
C. Production of ethylene gas
D. Regulation of stomatal opening
Question 4
In the process of osmoregulation, what is the primary mechanism by which the kidney regulates the concentration of ions in the blood?
A. Active transport of ions across the renal tubules
B. Passive diffusion of ions across the renal tubules
C. Excretion of excess ions through the urine
D. Reabsorption of ions from the filtrate
Question 5
In the process of respiration, what is the primary function of the mitochondria?
A. To synthesize ATP from glu\cose
B. To break down glu\cose to produce energy
C. To regulate the concentration of ions in the cell
D. To synthesize proteins from amino acids
Question 6
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?
A. Random mating
B. No mutation
C. No gene flow
D. No natural selection
Question 7
The e\cosystem shown below is a classic example of a what type of e\cosystem?
A. Grassland
B. Desert
C. Rainforest
D. Tundra
Question 8
A population of a species is growing exponentially. Which of the following is a characteristic of this population?
A. The population is increa\sing at a cons\tant rate
B. The population is decrea\sing at a cons\tant rate
C. The population is increa\sing at an increa\sing rate
D. The population is decrea\sing at a decrea\sing rate
Question 9
The process of meiosis in a diploid organism results in the production of four haploid cells. Which of the following is a characteristic of these haploid cells?
A. They have the same number of chromosomes as the parent cell
B. They have half the number of chromosomes as the parent cell
C. They have the same number of chromosomes as the diploid cell
D. They have twice the number of chromosomes as the diploid cell
Question 10
What is the primary function of the vacuole in plant cells?
A. Storage of water and minerals
B. Production of ethylene gas
C. Regulation of stomatal opening
D. Transport of sugars and other organic compounds
Question 11
In the process of digestion, what is the primary function of the pancreas?
A. To secrete digestive enzymes into the small intestine
B. To secrete hormones that regulate blood sugar levels
C. To regulate the pH of the stomach
D. To secrete mucus that protects the stomach lining
Question 12
A population of Drosophila melanogaster has a frequency of 0.4 for the allele A and 0.6 for the allele a. What is the frequency of the genotype AA?
A. 0.16
B. 0.24
C. 0.36
D. 0.48
Question 13
Asexual reproduction in plants can occur through which of the following methods?
A. Budding
B. Fragmentation
C. Runners
D. All of the above
Question 14
The nervous system is responsible for the transmission of signals between different parts of the body. Which of the following structures is responsible for the transmission of signals from sensory receptors to the central nervous system?
A. D\endrites
B. Axons
C. Synapses
D. Neuroglia
Question 15
A researcher is studying the population dynamics of a rabbit population. The population grows \logistically according to the equation dP/dt = rP\( 1-P/K \). If the carrying capacity K is 1000 and the initial population size is 100, what is the population size after 5 years?
A. 500
B. 750
C. 1000
D. 1250

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