POST UTME NILE UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the process of osmoregulation, which of the following is a primary mechanism for maintaining water balance in the body?
A. Active transport of ions across cell membranes
B. Passive diffusion of water across cell membranes
C. Excretion of excess water through the kidneys
D. Ingestion of water through drinking
Question 2
The diagram below shows a cross-section of a leaf cell. What is the function of the chloroplast in this cell?
A. Production of cell wall components
B. Regulation of cell turgor pressure
C. Absorption of water and minerals from the soil
D. Production of glu\cose through photosynthesis
Question 3
A 35-year-old female patient is diagnosed with a genetic disorder that affects her ability to metabolize certain amino acids. Which of the following enzymes is most likely deficient in her condition?
A. Phenylalanine hydroxylase
B. Tyro\sinase
C. Histidine decarboxylase
D. Tryptophan hydroxylase
Question 4
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Nucleus
B. Mitochondria
C. Cell wall
D. Chloroplast
Question 5
The structure of the human eye is adapted to focus light onto the retina. Which part of the eye is responsible for changing the focal length of the eye?
A. Cornea
B. Iris
C. Lens
D. Retina
Question 6
A 10-year-old child is diagnosed with a rare genetic disorder that affects the production of melanin. Which of the following is a likely consequence of this disorder?
A. Albinism
B. Vitiligo
C. Melasma
D. Hyperpigmentation
Question 7
The table below shows the results of a study on the effect of pH on the growth of a microorganism. What can be concluded from the data?
A. The microorganism grows best at a pH of 7
B. The microorganism grows best at a pH of 9
C. The microorganism grows best at a pH of 11
D. The microorganism does not grow at any pH
Question 8
A researcher is studying the effects of antibiotics on bacterial growth. Which of the following statements is true about the mode of action of antibiotics?
A. Antibiotics inhibit protein synthesis by binding to the 30S subunit of the ribosome
B. Antibiotics disrupt cell wall synthesis by inhibiting the enzyme transpeptidase
C. Antibiotics interfere with DNA replication by binding to the enzyme DNA polymerase
D. Antibiotics alter membrane permeability by disrupting the cell membrane
Question 9
The table below shows the results of a study on the effect of temperature on the growth of a microorganism. What can be concluded from the data?
A. The microorganism grows best at a temperature of 25°C
B. The microorganism grows best at a temperature of 37°C
C. The microorganism grows best at a temperature of 45°C
D. The microorganism does not grow at any temperature
Question 10
The diagram below shows the structure of a plant cell. Identify the part labeled A
A. Cell Wall
B. Cytoplasm
C. Nucleus
D. Mitochondria
Question 11
The diagram below shows a cross-section of a root hair cell. What is the function of the root hair in this cell?
Question 12
A 25-year-old male patient presents with symptoms of malabsorption. Which of the following conditions is most likely responsible for his symptoms?
A. Celiac disease
B. Crohn's disease
C. Ulcerative colitis
D. Whipple's disease
Question 13
A diagram of the human digestive system is shown below. Which part of the digestive system is responsible for absorbing nutrients?
A. Mouth
B. Esophagus
C. Stomach
D. Small Intestine
Question 14
The diagram below shows a cross-section of a root hair cell. What is the function of the root hair in this cell?
A. Absorption of water and minerals from the soil
B. Transport of nutrients from the roots to the rest of the plant
C. Production of cell wall components
D. Regulation of cell turgor pressure
Question 15
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
D. Lens

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