Question 1

Which scientist is credited with first observing microorganisms using simple microscopes and referring to them as 'animalcules' or 'beasties'?

Accepted Answer

Antoni van Leeuwenhoek

Question 2

Which of the following is NOT one of the six categories of microorganisms observed by Leeuwenhoek?

Accepted Answer

Viruses

Question 3

What is the main difference between bacterial and archaeal cell walls?

Accepted Answer

Bacterial cell walls contain peptidoglycan, while archaeal cell walls are composed of other polymers.

Question 4

Which of the following statements about fungi is correct?

Accepted Answer

Fungi obtain food from other organisms and possess cell walls composed of chitin.

Question 5

Protozoa are capable of locomotion by several means. Which structure is described as 'cell extensions that flow in the direction of travel'?

Accepted Answer

Pseudopods

Question 6

Which experiment disproved the theory of spontaneous generation by showing that maggots do not develop in meat kept isolated from flies?

Accepted Answer

Redi's decaying meat experiment

Question 7

Pasteur's experiments with 'swan-necked' flasks demonstrated that:

Accepted Answer

Microbes in dust are responsible for contamination.

Question 8

Which process did Pasteur develop to prevent spoilage of wine by killing most bacteria through heating?

Accepted Answer

Pasteurization

Question 9

Buchner's experiments showed that fermentation does not require living cells but instead is promoted by:

Accepted Answer

Enzymes

Question 10

Koch's postulates are a set of criteria used to establish the causative relationship between a microbe and a disease. Which is NOT one of Koch's postulates?

Accepted Answer

The agent must be able to survive without a host for at least 30 days.

Question 11

Which staining technique is most widely used and is one of the first steps in identifying a bacterium?

Accepted Answer

Gram's stain

Question 12

Which scientist is associated with the development of the taxonomic system for naming and grouping organisms?

Accepted Answer

Carolus Linnaeus

Question 13

Which of the following is true about archaea?

Accepted Answer

Archaea reproduce asexually and are found in extreme environments.

Question 14

Which field of microbiology involves the use of living bacteria, fungi, and algae to detoxify polluted environments?

Accepted Answer

Bioremediation

Question 15

Which of the following best describes viruses?

Accepted Answer

Acellular entities with genetic material surrounded by protein coats

Question 16

Which scientist's work led to the discovery of penicillin, the first antibiotic?

Accepted Answer

Fleming

Question 17

Which of the following is a correct application of the scientific method in microbiology?

Accepted Answer

Formulate a hypothesis, test it with experiments, and accept or reject the hypothesis based on results.

Question 18

Which of the following is NOT a step in the Gram stain procedure?

Accepted Answer

Application of methylene blue

Question 19

Which of the following statements about yeast is correct?

Accepted Answer

Yeasts are unicellular fungi that reproduce asexually by budding.

Question 20

Which of the following is a practical application of biochemistry in modern microbiology?

Accepted Answer

Design of herbicides and pesticides that are specific in their actions

A Brief History of Microbiology: Foundations and Early Discoveries

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