Question 1

Which of the following statements correctly distinguishes Archaea from Bacteria?

Accepted Answer

Archaea lack peptidoglycan in their cell walls and often live in extreme environments.

Question 2

Which scientist is credited with establishing the system of scientific nomenclature for organisms, and what is the correct format for writing a scientific name?

Accepted Answer

Carolus Linnaeus; genus is capitalized, species is lowercase, and both are italicized or underlined.

Question 3

A patient develops a biofilm on a medical implant. Which property of biofilms makes treatment challenging?

Accepted Answer

Biofilms can cause infections and are often resistant to antibiotics.

Question 4

Which of the following is NOT a characteristic of fungi?

Accepted Answer

They reproduce only asexually.

Question 5

Which experiment provided strong evidence against the theory of spontaneous generation by showing that maggots only appeared in meat when flies could access it?

Accepted Answer

Francesco Redi's decaying meat experiment.

Question 6

Which domain includes organisms with peptidoglycan in their cell walls?

Accepted Answer

Bacteria

Question 7

Pasteurization is a process used to kill harmful bacteria in beverages. Which statement best describes the process?

Accepted Answer

Application of high heat for a short time to kill harmful bacteria without evaporating alcohol.

Question 8

Which of the following is a correct example of scientific naming and abbreviation?

Accepted Answer

Escherichia coli (E. coli)

Question 9

Which of the following statements about viruses is TRUE?

Accepted Answer

Viruses are acellular and can only replicate inside a living host cell.

Question 10

Which scientist's work led to the development of aseptic techniques in microbiology?

Accepted Answer

Louis Pasteur

Question 11

Which of the following is a function of normal microbiota in the human body?

Accepted Answer

They produce growth factors such as vitamins B and K.

Question 12

Which emerging infectious disease is caused by a toxin-producing strain of E. coli and is a leading cause of bloody diarrhea worldwide?

Accepted Answer

E. coli O157:H7

Question 13

Which of the following is NOT a method of motility for protozoa?

Accepted Answer

Hyphae

Question 14

Which scientist developed experimental steps to prove that a specific microbe causes a specific disease, known as Koch's postulates?

Accepted Answer

Robert Koch

Question 15

Which of the following is a property of algae that distinguishes them from fungi?

Accepted Answer

Algae use photosynthesis for energy.

Question 16

Which of the following best describes the concept of biogenesis?

Accepted Answer

Living cells arise only from preexisting living cells.

Question 17

Which of the following diseases is caused by a virus that destroys CD4+ T cells and is transmitted sexually?

Accepted Answer

AIDS (acquired immunodeficiency syndrome)

Question 18

Which scientist discovered the first antibiotic, penicillin, and what was its initial target?

Accepted Answer

Alexander Fleming; Staphylococcus aureus

Question 19

Which of the following is a correct statement about the three domains of life?

Accepted Answer

Eukarya includes fungi, protozoa, algae, plants, and animals.

Question 20

Which of the following is an example of an emerging infectious disease that has not yet shown sustained human-to-human transmission?

Accepted Answer

Avian influenza A (H5N1)

Introduction to Microbiology: The Microbial World and You

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