Total magnification is $$10 \times 40 = 400$$

Total magnification = $$\text{ocular lens} \times \text{objective lens}$$

Question 1

Which scientist is credited with disproving the theory of spontaneous generation by using a swan-neck flask experiment?

Accepted Answer

Louis Pasteur

Question 2

What is the total magnification of a compound microscope if the ocular lens is 10x and the objective lens is 40x?

Accepted Answer

Total magnification is $$10 	imes 40 = 400$$

Question 3

Which type of microscope would be most appropriate for viewing the surface structure of pollen grains in three dimensions?

Accepted Answer

Scanning Electron Microscope

Question 4

Which of the following is NOT a step in Koch’s postulates?

Accepted Answer

The same agent must be reisolated from the inoculated, diseased organism.

Question 5

Which scientist first observed live bacteria and protozoans, calling them 'animalcules'?

Accepted Answer

Antony van Leeuwenhoek

Question 6

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

Accepted Answer

Eukaryotes have membrane-bound organelles, prokaryotes do not.

Question 7

Which microscope technique is best for observing living, unstained microorganisms with high contrast?

Accepted Answer

Phase-contrast microscopy

Question 8

Pasteurization, as invented by Louis Pasteur, is best described as:

Accepted Answer

Heating a substance to reduce the number of microorganisms, preventing spoilage.

Question 9

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

Accepted Answer

H. sapiens

Question 10

Which relationship describes two organisms that depend on each other to break down a substance neither can alone?

Accepted Answer

Synergism

Question 11

Which scientist introduced aseptic techniques in surgery by applying carbolic acid to wounds?

Accepted Answer

Joseph Lister

Question 12

Which domain includes organisms that often live in extreme environments such as hot springs or salty lakes?

Accepted Answer

Archaea

Question 13

Which of the following is NOT a use of microorganisms in everyday life?

Accepted Answer

Production of fossil fuels

Question 14

Which type of microbial transmission is most likely responsible for outbreaks of cholera in developing countries?

Accepted Answer

Waterborne transmission

Question 15

Which of the following statements about viruses is TRUE?

Accepted Answer

Viruses are metabolically inert and require a host for replication.

Question 16

Which scientist demonstrated that microbes exist in dust and provided evidence for heat-resistant bacteria?

Accepted Answer

John Tyndall

Question 17

Which microscope would you use to diagnose infectious diseases by observing specimens that emit light under UV radiation?

Accepted Answer

Fluorescence microscope

Question 18

Which of the following is a correct formula for calculating total magnification in a compound microscope?

Accepted Answer

Total magnification = $$	ext{ocular lens} 	imes 	ext{objective lens}$$

Question 19

Which of the following is NOT a characteristic of prokaryotes?

Accepted Answer

Presence of a nucleus

Question 20

Which scientist is known as the father of immunology for his work with cowpox and smallpox?

Accepted Answer

Edward Jenner

Chapter 1

Study Guide - Practice Questions