Question 1

Which of the following statements best distinguishes bacteria from archaea?

Accepted Answer

Bacteria have cell walls containing peptidoglycan, while archaea have cell walls that lack peptidoglycan.

Question 2

A patient presents with a fever and a rash. The fever is measured at 39°C by the nurse, while the patient reports feeling chills and muscle aches. According to clinical definitions, which of the following is a symptom?

Accepted Answer

Muscle aches

Question 3

Which of the following best describes the process of fermentation as discovered by Louis Pasteur?

Accepted Answer

Yeasts convert sugars to alcohol in the absence of air.

Question 4

Which of the following is a correct example of scientific nomenclature for a microorganism?

Accepted Answer

Escherichia coli

Question 5

A scientist discovers a new microorganism that is unicellular, has a nucleus, moves using cilia, and absorbs organic material from its environment. To which group does this organism most likely belong?

Accepted Answer

Protozoa

Question 6

Which of the following best explains why viruses are considered acellular?

Accepted Answer

They lack a cellular structure and can only reproduce inside host cells.

Question 7

Which of the following is a real-world example of bioremediation?

Accepted Answer

Using bacteria to break down oil spills in the ocean.

Question 8

Which of the following statements about biofilms is correct?

Accepted Answer

Biofilms can protect bacteria from antibiotics, making infections harder to treat.

Question 9

Which of the following best describes Koch’s postulates?

Accepted Answer

A sequence of experimental steps for directly relating a specific microbe to a specific disease.

Question 10

A researcher is using recombinant DNA technology to produce human insulin in bacteria. Which of the following best describes this process?

Accepted Answer

Inserting the human insulin gene into bacterial DNA to produce insulin protein.

Question 11

Which of the following is NOT a characteristic of fungi?

Accepted Answer

They carry out photosynthesis.

Question 12

Which of the following scenarios best illustrates the concept of an emerging infectious disease (EID)?

Accepted Answer

A new strain of influenza virus appears and spreads rapidly to multiple continents.

Question 13

Which of the following is a correct statement about the human microbiome?

Accepted Answer

It consists of microbes that live stably in and on the human body and contribute to health.

Question 14

Which of the following best explains why antibiotic resistance is a growing problem in medicine?

Accepted Answer

Random mutations in bacterial genes can confer resistance, allowing these bacteria to survive and proliferate in the presence of antibiotics.

Question 15

Which of the following is an example of biotechnology that does NOT use recombinant DNA technology?

Accepted Answer

Using Bacillus thuringiensis to control insect pests on crops.

Question 16

A hospital patient develops an infection on a catheter that is difficult to treat with antibiotics. Which property of biofilms most likely contributes to this problem?

Accepted Answer

Biofilms provide a protective barrier that increases bacterial resistance to antibiotics.

Question 17

Which of the following best describes the role of bacteria in the nitrogen cycle?

Accepted Answer

Bacteria convert atmospheric nitrogen into forms usable by plants and animals.

Question 18

Which of the following is a correct pairing of a scientist and their contribution to microbiology?

Accepted Answer

Joseph Lister – introduced aseptic techniques in surgery using phenol.

Question 19

Which of the following is a plausible reason why there are few successful antiviral drugs compared to antibiotics?

Accepted Answer

Drugs that interfere with viral reproduction often also harm uninfected host cells.

Question 20

A laboratory technician observes oval-shaped, unicellular organisms larger than bacteria, which reproduce asexually and have cell walls containing chitin. Which group do these organisms most likely belong to?

Accepted Answer

Yeasts (a type of fungi)

Chapter 1: The Microbial World and You – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards