POST UTME AL-HIKMAH UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A researcher is studying the effect of temperature on the rate of respiration in a plant. She measures the rate of respiration at different temperatures and plots the data on a graph. Which of the following is the most likely shape of the graph?
A. A sigmoid curve
B. A rec\tangular hyperbola
C. A linear line
D. A parabolic curve
Question 2
The process by which plants convert light energy into chemical energy is known as
A. Photosynthesis
B. Respiration
C. Transpiration
D. Translocation
Question 3
The type of tissue that is composed of nerve cells and their supporting cells is known as
A. Nervous tissue
B. Muscular tissue
C. Epithelial tissue
D. Connective tissue
Question 4
The process of photosynthesis is a type of cellular respiration that occurs in plants and some microorganisms. Which of the following best describes the equation for photosynthesis?
A. 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O2
B. 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 H2O
C. 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 CO2
D. 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 H2O + 6 O2
Question 5
The human body has a complex system of organs that work together to maintain homeostasis. Which of the following best describes the role of the pancreas in this system?
A. To produce hormones that regulate blood sugar levels.
B. To produce digestive enzymes that break down food in the small intestine.
C. To store waste products and excess subs\tances for later excretion.
D. To regulate the balance of electrolytes and water in the body.
Question 6
The transport of water and minerals from the roots to the leaves of a plant is primarily through the
A. Xylem
B. Phloem
C. Cortex
D. Endodermis
Question 7
In a tropical rainforest e\cosystem, what is the primary role of the leaf's cuticle in relation to transpiration?
A. To prevent water loss through transpiration
B. To facilitate gas exchange for photosynthesis
C. To protect the leaf from excessive sunlight
D. To regulate the opening and clo\sing of stomata
Question 8
A diagram of the human kidney is shown below. What is the primary function of the nephron?
A. To filter waste products from the blood
B. To regulate the amount of water in the body
C. To synthesize hormones and other biomolecules
D. To maintain the body's pH balance
Question 9
A patient is diagnosed with a genetic disorder that affects the production of a specific enzyme. The patient's enzyme activity is 10% of the normal level. Which of the following is the most likely effect of this enzyme deficiency on the patient's body?
A. The patient will experience muscle weakness and fatigue
B. The patient will have difficulty digesting certain types of food
C. The patient will experience vision problems
D. The patient will have difficulty regulating body temperature
Question 10
In the context of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
B. To produce NADH and FADH2 through glycolysis and the citric acid cycle
C. To pump protons across the mitochondrial inner membrane, creating a proton gradient
D. To convert glu\cose into pyruvate through glycolysis
Question 11
A diagram of the human brain is shown below. What is the function of the part labeled 'B'?
A. To control voluntary movements
B. To regulate body temperature
C. To process sensory information
D. To produce hormones
Question 12
The human body has a complex system of tissues that work together to perform various functions. Which of the following best describes the characteristics of epithelial tissue?
A. It is a type of connective tissue that provides support and structure to the body.
B. It is a type of muscle tissue that contracts to move the body.
C. It is a type of nervous tissue that transmits and processes information.
D. It is a type of epithelial tissue that forms the lining of organs and glands.
Question 13
In the e\cosystem of a freshwater lake, the following organisms are present: phytoplankton, zooplankton, fish, and bacteria. Which of the following best describes the role of phytoplankton in this e\cosystem?
A. Primary producers that convert sunlight into chemical energy through photosynthesis.
B. Decomposers that break down dead organic matter into nutrients.
C. Consumers that feed on phytoplankton and zooplankton.
D. Saprotrophs that obtain nutrients by decompo\sing dead organisms.
Question 14
In the xylem, what is the primary function of the tracheids?
A. Transport of water and minerals from roots to leaves
B. Transport of sugars and amino acids from leaves to roots
C. Storage of food and water in plants
D. Regulation of stomatal opening and clo\sing
Question 15
A genetic cross is performed between two pea plants, one with the genotype TT and the other with the genotype tt. What is the expected ratio of offspring?
A. 1:1
B. 3:1
C. 9:3:3:1
D. 1:3

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