Question 1

Which of the following statements best describes the main difference between prokaryotic and eukaryotic microorganisms?

Accepted Answer

Eukaryotic microorganisms have a distinct nucleus containing DNA, while prokaryotic microorganisms lack a membrane-bound nucleus.

Question 2

Which of the following is NOT a function performed by microbes in our lives?

Accepted Answer

Formation of multicellular animal tissues

Question 3

Which of the following correctly matches the microorganism with its cell wall composition?

Accepted Answer

Algae – cellulose

Question 4

A scientist isolates a microorganism that thrives in extremely salty environments and lacks peptidoglycan in its cell wall. To which domain does this organism most likely belong?

Accepted Answer

Archaea

Question 5

Which of the following experiments provided the strongest evidence against the theory of spontaneous generation?

Accepted Answer

Pasteur’s experiment using S-shaped flasks to prevent airborne microbes from entering boiled broth

Question 6

Which of the following best describes the role of normal microbiota in human health?

Accepted Answer

They prevent the growth of pathogens and produce essential vitamins.

Question 7

Which of the following is a correct application of recombinant DNA technology?

Accepted Answer

Using bacteria to produce human insulin for diabetes treatment

Question 8

A patient is infected with a microorganism that is acellular, contains either DNA or RNA, and is inert outside a living host. Which type of microorganism is most likely responsible?

Accepted Answer

Virus

Question 9

Which of the following statements about biofilms is TRUE?

Accepted Answer

Biofilms are masses of microbes that attach to solid surfaces and are often resistant to antibiotics.

Question 10

Which of the following best explains why Bacillus thuringiensis is used in agriculture?

Accepted Answer

It produces protein crystals toxic to insects but harmless to animals and plants.

Question 11

Which of the following is an example of an emerging infectious disease (EID)?

Accepted Answer

COVID-19

Question 12

Which scientist is credited with first observing 'animalcules' through magnifying lenses, marking a significant advancement in microbiology?

Accepted Answer

Anton van Leeuwenhoek

Question 13

Which of the following is a correct statement about the scientific naming of microorganisms?

Accepted Answer

The genus is capitalized and the specific epithet is lowercase; both are italicized or underlined.

Question 14

Which of the following best describes the process of bioremediation?

Accepted Answer

Using microbes to clean up pollutants such as oil and mercury

Question 15

Which of the following is NOT a characteristic of fungi?

Accepted Answer

They divide by binary fission.

Question 16

Which of the following statements about antibiotics is correct?

Accepted Answer

Antibiotics are chemicals produced by bacteria and fungi that inhibit or kill other microbes.

Question 17

Which of the following is a correct example of a multi-step application of microbiology in medicine?

Accepted Answer

Using recombinant DNA technology to insert a human gene into bacteria, which then produce a therapeutic protein for treating a genetic disorder.

Question 18

Which of the following is NOT a domain in the three-domain system of classification developed by Carl Woese?

Accepted Answer

Protista

Question 19

Which of the following best describes the concept of resistance in the context of microbiology?

Accepted Answer

The ability of the body to ward off disease using factors such as skin, stomach acid, and antimicrobial chemicals.

Question 20

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

Accepted Answer

They have a protein coat that may be enclosed in a lipid envelope and can only replicate inside a living host cell.

Chapter 1: The Microbial World and You – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards