Question 1

Which of the following statements best describes the main contribution of Antonie van Leeuwenhoek to microbiology?

Accepted Answer

He was the first to observe and describe single-celled microorganisms using a microscope.

Question 2

Which of the following is NOT considered a microbe according to the definition provided in microbiology?

Accepted Answer

Plants

Question 3

A patient presents with rapidly progressing dementia, muscle stiffness, and abnormal EEG. CSF analysis reveals high 14-3-3 protein but no inflammation. Which infectious agent is most likely responsible?

Accepted Answer

Prion

Question 4

Which of the following best explains why antibiotics were ineffective in treating Cora’s illness?

Accepted Answer

Her infection was caused by a prion, which lacks cellular structure and metabolic pathways targeted by antibiotics.

Question 5

Which of the following is a correct example of binomial nomenclature?

Accepted Answer

Homo sapiens

Question 6

Which of the following is a distinguishing feature of prion diseases such as Creutzfeldt-Jakob Disease (CJD)?

Accepted Answer

Accumulation of misfolded proteins forming plaques and sponge-like lesions in neural tissue

Question 7

Which of the following best describes the difference between prokaryotes and eukaryotes?

Accepted Answer

Eukaryotes have membrane-bound organelles, prokaryotes do not.

Question 8

Which of the following scenarios best illustrates the concept of microbes being beneficial to humans?

Accepted Answer

Bacteria are used in the fermentation of yogurt.

Question 9

Which of the following is the correct order of taxonomic classification from broadest to most specific?

Accepted Answer

Domain, Kingdom, Phylum, Class

Question 10

Which of the following is a plausible route of transmission for prion diseases?

Accepted Answer

Ingestion of contaminated nervous tissue

Question 11

Which of the following best describes the Germ Theory of Disease?

Accepted Answer

Diseases are caused by invisible living organisms (microbes).

Question 12

Which of the following is NOT a common shape of bacteria?

Accepted Answer

Hyphae

Question 13

A scientist observes a microbe that lacks a nucleus and has a cell wall made of peptidoglycan. To which group does this organism most likely belong?

Accepted Answer

Bacteria

Question 14

Which of the following best explains why prion diseases are difficult to treat?

Accepted Answer

Prions are resistant to standard sterilization methods and do not contain nucleic acids.

Question 15

Which of the following is an example of an acellular pathogen?

Accepted Answer

Virus

Question 16

Which of the following historical practices demonstrates early use of microbes before their discovery?

Accepted Answer

Fermentation of foods and beverages

Question 17

Which of the following best describes the role of Carolus Linnaeus in microbiology?

Accepted Answer

He developed the binomial nomenclature system for naming organisms.

Question 18

Which of the following is a eukaryotic microorganism?

Accepted Answer

Fungi

Question 19

Which of the following best explains why CJD is classified as a transmissible spongiform encephalopathy?

Accepted Answer

It is caused by misfolded prion proteins that create sponge-like lesions in neural tissue.

Question 20

Which of the following best describes the process by which prion diseases can be transmitted?

Accepted Answer

By ingestion of contaminated nervous tissue or through tissue transplants

Introduction to Microbiology: History, Classification, and Scope

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