POST UTME MADONNA UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A patient has been diagnosed with a genetic disorder that affects the production of a specific enzyme. Which of the following is a likely consequence?
A. Increased risk of cancer
B. Increased risk of heart disease
C. Increased risk of neuro\logical disorders
D. Increased risk of metabolic disorders
Question 2
In a photosynthetic pathway, what is the primary function of the enzyme RuBisCO?
A. Fixation of CO2
B. Reduction of NADP+
C. Regeneration of RuBP
D. Oxidation of NADPH
Question 3
The process of gas exchange in plants occurs through the stomata. Which of the following is a benefit of having stomata on the underside of leaves?
A. It allows for more efficient gas exchange
B. It reduces water loss through transpiration
C. It increases the surface area for photosynthesis
D. It allows for more efficient nutrient uptake
Question 4
A diagram of the human skeletal system is shown below. Which bone is responsible for protecting the heart and lungs?
A. Ribcage
B. Sternum
C. Spine
D. Skull
Question 5
A kidney stone is composed of calcium oxalate crystals. What is the primary mechanism by which the kidneys excrete this subs\tance?
A. Filtration
B. Reabsorption
C. Secretion
D. Osmosis
Question 6
The structure of a plant cell includes a cell wall, cytoplasm, and a nucleus. Which of the following is a function of the cell wall?
A. Support and protection
B. Transport of materials
C. Production of energy
D. Cell signaling
Question 7
In the context of evolutionary theory, what is the primary mechanism by which natural selection acts on genetic variation?
A. Genetic drift
B. Gene flow
C. Mutation
D. Differential reproduction
Question 8
The process of meiosis is a type of cell division that results in the production of gametes. Which of the following is a characteristic of meiosis?
A. Reduction in chromosome number
B. Increase in chromosome number
C. No change in chromosome number
D. Production of somatic cells
Question 9
A 1.5 L flask contains 0.3 M glu\cose at 25°C. What is the total number of moles of glu\cose present in the flask?
A. 0.45 mol
B. 0.5 mol
C. 0.55 mol
D. 0.6 mol
Question 10
A researcher studying the eco\logy of a freshwater lake observes that the water temperature varies between 10°C and 25°C throughout the year. What is the likely effect of this temperature fluctuation on the metabolic rate of aquatic organisms?
A. Increased metabolic rate
B. Decreased metabolic rate
C. No effect on metabolic rate
D. Variable metabolic rate
Question 11
A 0.1 M solution of HCl is mixed with a 0.2 M solution of NaOH. What is the pH of the resulting solution?
A. 1
B. 2
C. 3
D. 4
Question 12
A 2.5 L flask contains 0.5 M NaCl at 25°C. What is the total number of moles of gas present in the flask?
A. 0.1 mol
B. 0.2 mol
C. 0.3 mol
D. 0.4 mol
Question 13
A diagram of a human cell is shown below. Which of the following statements is true regarding the structure of the cell?
A. The cell membrane is the outermost layer of the cell
B. The cytoplasm is the region between the cell membrane and the nucleus
C. The nucleus is the region that contains the cell's genetic material
D. All of the above
Question 14
The process of digestion involves the breakdown of food into smaller molecules that can be absorbed and utilized by the body. Which of the following enzymes is responsible for the breakdown of carbohydrates?
A. Amylase
B. Lipase
C. Tryp\sin
D. Pep\sin
Question 15
A diagram of a human nervous system is shown below. Which of the following statements is true regarding the structure of the nervous system?
A. The brain is the control center of the nervous system
B. The spinal cord is the part of the nervous system that connects the brain to the rest of the body
C. The nerves are the part of the nervous system that transmit signals to and from the brain
D. All of the above

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: