POST UTME COVENANT UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The excretory system in humans is responsible for removing waste products from the body through the process of
A. Osmosis
B. Diffusion
C. Active Transport
D. Filtration
Question 2
A researcher is studying the effect of pH on the activity of the enzyme lactase. Which of the following is the most likely effect of increa\sing the pH?
A. Increased activity of lactase
B. Decreased activity of lactase
C. No effect on lactase activity
D. Inhibition of lactase activity
Question 3
The process by which an organism grows and develops from a \single cell to a complex multicellular organism is called
A. Mitosis
B. Meiosis
C. Differentiation
D. Development
Question 4
A patient is diagnosed with a genetic disorder caused by a point mutation in the HBB gene. Which of the following is the most likely effect of this mutation?
A. Increased production of hemoglobin
B. Decreased production of hemoglobin
C. Production of abnormal hemoglobin
D. No effect on hemoglobin production
Question 5
What is the primary function of the Golgi apparatus in a plant cell?
A. To synthesize proteins
B. To synthesize lipids
C. To modify and package proteins and lipids for transport
D. To synthesize carbohydrates
Question 6
A 25-year-old woman presents with primary amenorrhea. Her karyotype is 46,XX. What is the most likely cause of her condition?
A. Androgen insensitivity syndrome
B. Turner syndrome
C. Congenital adrenal hyperplasia
D. Mayer-Roki\tansky-Küster-Hauser syndrome
Question 7
A population of bacteria is growing in a controlled environment. Which of the following is the most likely effect of increa\sing the concentration of glu\cose?
A. Increased growth rate of bacteria
B. Decreased growth rate of bacteria
C. No effect on bacterial growth
D. Inhibition of bacterial growth
Question 8
The microorganism responsible for cau\sing tuberculosis is
A. Escherichia coli
B. Staphylococcus aureus
C. Mycobacterium tuberculosis
D. Salmonella typhi
Question 9
A 30-year-old man presents with a 2-year history of infertility. His semen analysis shows azoospermia. What is the most likely cause of his condition?
A. Klinefelter syndrome
B. Varicocele
C. Cryptorchidism
D. Obstructive azoospermia
Question 10
In a photosynthetic pathway, which of the following is the primary function of the enzyme RuBisCO?
A. Fixing CO2 into a 3-carbon molecule
B. Converting RuBP into 3-phosphoglycerate
C. Regenerating RuBP from 3-phosphoglycerate
D. Reducing NADP+ to NADPH
Question 11
A 35-year-old man presents with a 5-year history of infertility. His semen analysis shows oligospermia. What is the most likely cause of his condition?
A. Varicocele
B. Cryptorchidism
C. Obstructive azoospermia
D. Klinefelter syndrome
Question 12
The diagram below shows a cross-section of a plant root. What is the function of the xylem tissue?
A. To transport water and minerals from the roots to the leaves
B. To store food and water in the roots
C. To produce hormones that regulate plant growth
D. To support the structure of the plant
Question 13
The hormone that stimulates the release of insulin from the pancreas is
A. Glucagon
B. Insulin
C. Ghrelin
D. Somatostatin
Question 14
In the context of osmoregulation, what is the primary function of the kidneys in a desert-dwelling organism?
A. To conserve water by reabsorbing glu\cose and amino acids
B. To excrete excess salt and water through the urine
C. To regulate the concentration of electrolytes in the blood
D. To produce antidiuretic hormone (ADH) to reduce water loss
Question 15
In a human body, what is the primary function of the circulatory system?
A. To transport oxygen and nutrients to cells
B. To transport waste products away from cells
C. To regulate body temperature
D. To maintain fluid balance

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