Question 1

Which scientist's experiments with beef gravy and plant infusions reinforced the idea that microbes could arise spontaneously, even though large animals could not?

Accepted Answer

John Needham

Question 2

In Spallanzani's experiments, what was the main reason he concluded that Needham's results were flawed?

Accepted Answer

Needham failed to heat vials sufficiently or seal them tightly enough

Question 3

Pasteur's 'swan-necked flask' experiment was significant because it demonstrated which principle?

Accepted Answer

Microbial growth only occurs when dust and microbes from the air enter the flask

Question 4

Which step in the scientific method directly follows the generation of a hypothesis?

Accepted Answer

Experimentation

Question 5

Which process, developed by Pasteur, involves heating liquids just enough to kill most bacteria and is widely used in the food industry?

Accepted Answer

Pasteurization

Question 6

Buchner's experiments demonstrated that fermentation does not require living cells. What did he show was responsible for promoting chemical reactions?

Accepted Answer

Enzymes

Question 7

Robert Koch is credited with which of the following discoveries?

Accepted Answer

Demonstrating a bacterium causes anthrax

Question 8

Which of the following is NOT one of Koch's postulates?

Accepted Answer

The agent must be able to survive without a host for at least 24 hours

Question 9

Gram's stain is important in microbiology because it:

Accepted Answer

Is one of the first steps in identifying a bacterium

Question 10

Which scientist's work led to the field of immunology by developing the first vaccine?

Accepted Answer

Edward Jenner

Question 11

Which field of microbiology focuses on the study of viruses?

Accepted Answer

Virology

Question 12

Which process uses living bacteria, fungi, and algae to detoxify polluted environments?

Accepted Answer

Bioremediation

Question 13

Avery, MacLeod, and McCarty determined that genes are contained in which type of molecule?

Accepted Answer

DNA

Question 14

Which scientist proposed that gene sequences could be used to understand evolutionary relationships and establish taxonomic categories?

Accepted Answer

Pauling

Question 15

Which of the following is a practical application of biochemistry that originated from Pasteur's and Buchner's work?

Accepted Answer

Design of herbicides and pesticides

Question 16

Gene therapy involves which of the following?

Accepted Answer

Inserting a missing or repairing a defective gene in humans

Question 17

Which scientist discovered penicillin, leading to the field of chemotherapy?

Accepted Answer

Fleming

Question 18

Which of the following equations best represents the process of fermentation as studied by Pasteur and Buchner?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} \rightarrow 2\ \mathrm{C_2H_5OH} + 2\ \mathrm{CO_2$}$$

Question 19

A hospital is experiencing an outbreak of a disease. According to Koch's postulates, what is the correct sequence to identify the causative agent?

Accepted Answer

Find agent in every case, isolate and grow agent, introduce to healthy host, find agent in diseased host

Question 20

Which of the following best describes the role of serology in modern microbiology?

Accepted Answer

Study of blood serum and its chemicals/cells that fight infection

A Brief History of Microbiology: The Golden Age and Foundations of the Field

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