POST UTME UNIBEN 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of the human excretory system is shown below. Which part of the excretory system is responsible for filtering waste products from the blood?
A. Kidneys
B. Ureters
C. Bladder
D. Urethra
Question 2
In the context of evolutionary theory, what is the term for the process by which a population becomes reproductively isolated from other populations, leading to the formation of new species?
A. Speciation
B. Adaptation
C. Natural selection
D. Genetic drift
Question 3
In the context of growth and development, what is the term for the process by which an organism increases in size and complexity?
A. Growth
B. Development
C. Differentiation
D. Maturation
Question 4
The process of osmoregulation in animals involves the regulation of water and ion balance across cell membranes. Which of the following is a key mechanism involved in osmoregulation in the kidney?
A. Active transport of ions across the renal tubular epithelium
B. Passive diffusion of water across the renal tubular epithelium
C. Excretion of excess ions in the urine
D. Reabsorption of glu\cose and amino acids in the renal tubules
Question 5
In the context of photosynthesis, what is the role of the enzyme RuBisCO in the Calvin cycle?
A. It catalyzes the conversion of CO2 to glu\cose
B. It is involved in the light-dep\endent reactions
C. It is a key enzyme in the breakdown of glu\cose
D. It is responsible for the regeneration of RuBP
Question 6
The process of osmoregulation in animals involves the regulation of water and ion balance across cell membranes. Which of the following is a key mechanism involved in osmoregulation in the gut?
A. Active transport of ions across the intestinal epithelium
B. Passive diffusion of water across the intestinal epithelium
C. Excretion of excess ions in the feces
D. Reabsorption of glu\cose and amino acids in the intestinal epithelium
Question 7
A cell in the G2 phase of the cell cycle has a DNA content of 8C. What is the most likely explanation for this?
A. Endoreduplication
B. Polyploidy
C. DNA replication error
D. Mitotic error
Question 8
Which of the following sense organs is responsible for detecting changes in blood pressure?
A. Baroreceptors in the carotid \sinus
B. Mechanoreceptors in the skin
C. Proprioceptors in the muscles
D. Chemoreceptors in the lungs
Question 9
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'rr'?
A. 0.25
B. 0.5
C. 0.75
D. 1
Question 10
The diagram below represents a simple electrical circuit. Which of the following components is responsible for the flow of electrons through the circuit?
A. Battery
B. Resistor
C. Wire
D. Switch
Question 11
A diagram of the human respiratory system is shown below. What is the primary function of the alveoli?
A. To exchange oxygen and carbon dioxide with the blood
B. To filter the air we breathe
C. To produce mucus that traps dust and other particles
D. To regulate body temperature
Question 12
A 2.5 M solution of glu\cose is diluted to 0.5 M. What is the volume of the solvent added to achieve this dilution?
A. 1 L
B. 2 L
C. 4 L
D. 6 L
Question 13
In the context of classification of living things, the kingdom Monera includes
A. Bacteria and archaea
B. Fungi and protozoa
C. Plants and animals
D. Protists and algae
Question 14
A diagram of the human \endocrine system is shown below. Which part of the \endocrine system is responsible for regulating blood sugar levels?
Question 15
The theory of evolution by natural selection proposes that which of the following mechanisms is responsible for the adaptation of species to their environments?
A. Genetic drift
B. Mutation
C. Gene flow
D. Natural selection

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