POST UTME UNIOSUN 2017 Biology | Objective

Are you preparing for POST UTME UNIOSUN exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2017 Biology (Objective) questions designed to simulate the real exam environment.

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Question 1
In a typical terrestrial e\cosystem, what is the primary function of the xylem tissue in plants?
Correct A. Transport of water and minerals from the roots to the leaves
B. Transport of sugars and amino acids from the leaves to the roots
C. Production of ATP through photosynthesis
D. Regulation of stomatal opening and clo\sing

Correct Answer: A

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Question 2
A patient is diagnosed with a bacterial infection caused by Staphylococcus aureus. Which of the following antibiotics is most likely to be effective against this bacterium?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
Correct D. Vancomycin

Correct Answer: D

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Question 3
In a freshwater e\cosystem, what is the primary role of the phytoplankton community?
Correct A. Primary producers of the e\cosystem
B. Decomposers of organic matter
C. Predators of zooplankton
D. Competitors of phytoplankton for resources

Correct Answer: A

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Question 4
A diagram of the human respiratory system is shown below. What is the function of the alveoli?
Correct A. Exchange of oxygen and carbon dioxide between the lungs and the bloodstream
B. Production of mucus to trap dust and pathogens
C. Regulation of breathing rate
D. Filtering of inhaled air

Correct Answer: A

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Question 5
A diagram of the human digestive system is shown below. What is the function of the pancreas?
A. Production of bile to emulsify fats
B. Production of digestive enzymes to break down proteins
Correct C. Production of hormones to regulate blood sugar levels
D. Absorption of nutrients into the bloodstream

Correct Answer: C

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Question 6
In a typical terrestrial e\cosystem, which of the following biomes is characterized by a high level of biodiversity and a complex network of relationships between species?
Correct A. Tropical Rainforest
B. Temperate Rainforest
C. Desert
D. Grassland

Correct Answer: A

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Question 7
A hormone that stimulates the breakdown of glycogen to glu\cose in the liver and muscles is:
Correct A. Glucagon
B. Insulin
C. Adrenaline
D. Thyroxine

Correct Answer: A

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Question 8
The process by which plants convert light energy into chemical energy is known as:
Correct A. Photosynthesis
B. Respiration
C. Transpiration
D. Translocation

Correct Answer: A

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Question 9
The diagram below shows the structure of a plant cell. Which of the following organelles is responsible for protein synthesis?
A. Nucleus
B. Mitochondria
Correct C. Ribosome
D. Lysosome

Correct Answer: C

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Question 10
The diagram below shows the structure of a human heart. Which of the following chambers is responsible for pumping oxygenated blood to the lungs?
A. Left Ventricle
Correct B. Right Ventricle
C. Left Atrium
D. Right Atrium

Correct Answer: B

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Question 11
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the Δπρασελλες (Δπρασελλες) complex. What is the primary function of the Δπρασελλες complex in this context?
A. To bind to the centromere and initiate sister chromatid separation
B. To phosphorylate histone H3 and condense chromatin
Correct C. To activate the anaphase-promoting complex (APC)
D. To regulate the spindle checkpoint

Correct Answer: C

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Question 12
In a desert e\cosystem, the primary producers are typically small plants such as cacti and succulents. What is the primary function of these plants in the e\cosystem?
A. To produce oxygen through photosynthesis
B. To provide food for herbivores
C. To stabilize the soil and prevent erosion
Correct D. To regulate the water cycle

Correct Answer: D

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Question 13
The xylem is a type of vascular tissue found in plants that is responsible for transporting water and minerals from the roots to the leaves. What is the primary function of the xylem in this context?
A. To transport sugars and other organic compounds
B. To regulate the water potential of the plant
C. To provide structural support to the plant
Correct D. To transport water and minerals from the roots to the leaves

Correct Answer: D

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Question 14
The process of osmoregulation in animals involves the regulation of the concentration of solutes in the body fluids. What is the primary mechanism by which animals regulate the concentration of solutes in their body fluids?
Correct A. By adjusting the rate of water intake and excretion
B. By regulating the concentration of ions in the body fluids
C. By adjusting the rate of nutrient uptake and excretion
D. By regulating the concentration of water in the body fluids

Correct Answer: A

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Question 15
The sense organ responsible for detecting changes in light intensity is the Δπερλεια (Δπερλεια). What is the primary function of the Δπερλεια in this context?
A. To detect changes in sound waves
Correct B. To detect changes in light intensity
C. To detect changes in temperature
D. To detect changes in touch

Correct Answer: B

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Question 16
The process by which plants convert light energy into chemical energy is known as:
A. Respiration
Correct B. Photosynthesis
C. Decomposition
D. Fermentation

Correct Answer: B

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Question 17
The diagram below shows the structure of a cell. Identify the part labeled A:
Correct A. Nucleus
B. Mitochondria
C. Endoplasmic Reticulum
D. Lysosome

Correct Answer: A

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Question 18
The equation for the reaction of sodium hydroxide with hydrochloric acid is:
Correct A. \( NaOH + HCl \rightarrow NaCl + H_2O \)
B. \( NaOH + HCl \rightarrow NaCl + CO_2 \)
C. \( NaOH + HCl \rightarrow NaCl + O_2 \)
D. \( NaOH + HCl \rightarrow NaCl + H_2 \)

Correct Answer: A

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Question 19
The diagram below shows a titration setup. Identify the part labeled B:
A. Conical Flask
Correct B. Burette
C. Pipette
D. Beaker

Correct Answer: B

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Question 20
The process by which an organism's genetic information is passed from one generation to the next is known as:
A. Mutation
B. Genetic Drift
C. Gene Expression
Correct D. Heritability

Correct Answer: D

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Question 21
In the context of classification of living things, what is the primary function of the kingdom level?
A. To group organisms based on their cell structure
Correct B. To group organisms based on their genetic makeup
C. To group organisms based on their body structure
D. To group organisms based on their habitat

Correct Answer: B

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Question 22
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?
A. The cell will shrink due to water loss
Correct B. The cell will swell due to water uptake
C. The cell will remain unchanged
D. The cell will burst due to osmotic pressure

Correct Answer: B

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Question 23
Asexual reproduction in plants can occur through which of the following methods?
A. Budding
B. Fragmentation
C. Runners
Correct D. All of the above

Correct Answer: D

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Question 24
The process of photosynthesis in plants involves the conversion of light energy into chemical energy. What is the primary byproduct of this process?
A. Glu\cose
B. Oxygen
Correct C. Both glu\cose and oxygen
D. Neither glu\cose nor oxygen

Correct Answer: C

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Question 25
The human nervous system is responsible for transmitting signals between different parts of the body. What is the primary function of the synapse?
Correct A. To transmit signals from one nerve cell to another
B. To receive signals from sensory receptors
C. To regulate muscle contraction
D. To produce hormones

Correct Answer: A

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