POST UTME UNIBEN 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of digestion in the human body involves the breakdown of food into smaller molecules. Which of the following enzymes plays a key role in the breakdown of proteins?
A. Amylase
B. Lipase
C. Tryp\sin
D. Lactase
Question 2
The human eye's ability to focus on objects at different dis\tances is known as accommodation. Which of the following muscles plays a crucial role in accommodation?
A. Ciliary muscles
B. Sphincter pupillae
C. Dilator pupillae
D. Extraocular muscles
Question 3
A diagram of the human circulatory system is shown below. What is the primary function of the capillaries?
A. Exchange of oxygen and carbon dioxide
B. Production of blood cells
C. Regulation of blood pressure
D. Maintenance of blood volume
Question 4
A diagram of the human nervous system is shown below. What is the primary function of the cerebellum?
A. Regulation of movement
B. Maintenance of posture
C. Regulation of balance
D. Maintenance of coordination
Question 5
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. Photosynthesis
B. Respiration
C. Storage of nutrients
D. Production of hormones
Question 6
The diagram below shows the structure of a mitochondrion. Identify the part labeled 'X'.
A. Mitochondrial Matrix
B. Inner Membrane
C. Outer Membrane
D. Cristae
Question 7
The process of mitosis in a eukaryotic cell results in the production of daughter cells that are genetically identical to the parent cell. Which of the following stages of mitosis is responsible for the separation of chromosomes into two daughter cells?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 8
A diagram of the human respiratory system is shown below. Identify the structure labeled 'A'.
A. Lungs
B. Trachea
C. Diaphragm
D. Bronchi
Question 9
In the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Maintenance of homeostasis
C. Stimulation of the immune system
D. Modulation of the autonomic nervous system
Question 10
A plant hormone that promotes cell elongation and cell division is:
A. Auxin
B. Gibberellin
C. Cytokinin
D. Ethylene
Question 11
In a population of 1000 bacteria, 80% are susceptible to a particular antibiotic. If 200 bacteria are exposed to the antibiotic, what is the expected number of resis\tant bacteria?
A. 120
B. 150
C. 180
D. 200
Question 12
In a tropical rainforest e\cosystem, what is the primary function of the leaf's cuticle?
A. To prevent water loss through transpiration
B. To regulate temperature and prevent overheating
C. To facilitate gas exchange and photosynthesis
D. To protect the leaf from herbivores and pathogens
Question 13
A 2.5 L flask contains 0.5 mol of an ideal gas at 27°C. What is the pressure of the gas?
A. 1.01 × 10^5 Pa
B. 2.02 × 10^5 Pa
C. 3.03 × 10^5 Pa
D. 4.04 × 10^5 Pa
Question 14
A cell is undergoing mitosis. Which of the following statements regarding the stages of mitosis is correct?
A. Prophase is the stage where the chromosomes condense and the nuclear envelope breaks down.
B. Metaphase is the stage where the chromosomes align at the metaphase plate.
C. Anaphase is the stage where the sister chromatids separate.
D. Telophase is the stage where the nuclear envelope reforms.
Question 15
A 30-year-old woman has been experiencing symptoms of depression for the past 6 months. Her Hamilton Rating Scale for Depression (HRSD) score is 25. What is the most likely diagnosis?
A. Major depressive disorder
B. Bipolar disorder
C. Postpartum depression
D. Seasonal affective disorder

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