Question 1

Which of the following best describes a pathogen?

Accepted Answer

A microorganism that causes disease in its host.

Question 2

Which of the following is NOT a major group of pathogenic microbes?

Accepted Answer

Algae

Question 3

Which statement correctly distinguishes between infectious and non-infectious diseases?

Accepted Answer

Infectious diseases can be transmitted from person to person, while non-infectious diseases cannot.

Question 4

Which of the following is a correct example of a non-infectious disease?

Accepted Answer

Diabetes

Question 5

A scientist is using a microscope to observe viruses. Which type of microscope would provide the highest resolution for this purpose?

Accepted Answer

Transmission electron microscope (TEM)

Question 6

Which of the following statements about bacteria is TRUE?

Accepted Answer

Bacteria can be beneficial, neutral, or harmful to humans.

Question 7

What is the main structural difference between viruses and bacteria?

Accepted Answer

Bacteria are cellular organisms, while viruses are non-cellular entities consisting of nucleic acid and a protein coat.

Question 8

Which of the following equations correctly represents the relationship between wavelength ($$\lambda) $$and resolution ($$R) in $$microscopy?

Accepted Answer

$$R \propto \lambda$$

Question 9

A patient contracts a disease after drinking contaminated water. Which type of disease transmission does this scenario illustrate?

Accepted Answer

Indirect transmission via contaminated fluids

Question 10

Which of the following is a characteristic of protozoa?

Accepted Answer

They are unicellular eukaryotes.

Question 11

Which of the following best explains why electron microscopes have higher resolution than light microscopes?

Accepted Answer

Electrons have a much shorter wavelength than visible light.

Question 12

Which of the following is NOT a function of beneficial bacteria in the human body?

Accepted Answer

Causing food poisoning

Question 13

Which of the following diseases is most likely to be caused by a fungus?

Accepted Answer

Ringworm

Question 14

A researcher wants to observe the surface structure of a virus particle. Which type of microscope should they use?

Accepted Answer

Scanning electron microscope (SEM)

Question 15

Which of the following is a correct statement about the spread of infectious diseases?

Accepted Answer

Infectious diseases can be spread through air, water, food, and contact with contaminated surfaces.

Question 16

Which of the following best describes the role of a parasite?

Accepted Answer

A parasite lives on or in a host and derives nutrients at the host's expense.

Question 17

Which of the following is a distinguishing feature of viruses compared to other microorganisms?

Accepted Answer

Viruses require a host cell to replicate.

Question 18

Which of the following best explains why not all bacteria are considered pathogens?

Accepted Answer

Many bacteria perform essential functions and do not harm the host.

Question 19

Which of the following is a correct match between a type of microscope and its primary use?

Accepted Answer

Fluorescence microscope: visualizing specific proteins in cells

Question 20

Which of the following is a correct statement about the history of microbiology?

Accepted Answer

Antonie van Leeuwenhoek was among the first to observe living microorganisms.

The Role of Microorganisms in Disease

Study Guide - Practice Questions