About this Study Set
This study set covers Microbiology through
20 practice questions.
A collection of factual multiple-choice questions focusing on key dates, figures, and numerical data in microbiology. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 20 questions from the
Microbiology Essentials: Facts and Figures study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
In what year did Antonie van Leeuwenhoek first report his observations of 'animalcules' to the Royal Society?
-
A
1676
-
B
1776
-
C
1876
-
D
1576
2
How many microns (micrometers) are typically contained in one millimeter?
-
A
10
-
B
100
-
C
1,000
-
D
10,000
3
Louis Pasteur developed the first vaccine for rabies in which year?
-
A
1885
-
B
1855
-
C
1905
-
D
1825
4
Robert Koch received the Nobel Prize in Physiology or Medicine in 1905 for his work on which disease?
-
A
Malaria
-
B
Tuberculosis
-
C
Cholera
-
D
Anthrax
5
Alexander Fleming discovered penicillin in a London laboratory in which year?
-
A
1918
-
B
1928
-
C
1938
-
D
1948
6
Approximately what percentage of the atmosphere is composed of nitrogen, which nitrogen-fixing bacteria help process?
7
The Gram stain procedure was developed by Hans Christian Gram in which decade?
-
A
1850s
-
B
1860s
-
C
1870s
-
D
1880s
8
How many domains of life are recognized in the system proposed by Carl Woese in 1990?
9
Dmitri Ivanovsky is credited with discovering the first virus (Tobacco Mosaic Virus) in which year?
-
A
1892
-
B
1912
-
C
1872
-
D
1922
10
What is the approximate number of bacterial cells estimated to inhabit the human microbiome?
-
A
Trillions
-
B
Billions
-
C
Millions
-
D
Thousands
11
In 1952, which scientists confirmed that DNA is the genetic material of bacteriophages?
-
A
Hershey and Chase
-
B
Watson and Crick
-
C
Franklin and Wilkins
-
D
Darwin and Wallace
12
Joseph Lister introduced the use of carbolic acid as an antiseptic in surgery during which year?
-
A
1867
-
B
1887
-
C
1857
-
D
1897
13
The first human case of the H5N1 avian influenza virus was identified in which year?
-
A
1997
-
B
1987
-
C
2007
-
D
2017
14
How many micrometers wide is a typical E. coli bacterium?
-
A
1-2
-
B
5-10
-
C
15-20
-
D
50-100
15
Edward Jenner successfully tested the first smallpox vaccine in which year?
-
A
1796
-
B
1896
-
C
1696
-
D
1756
16
Approximately how many species of bacteria have been formally named according to the LPSN database?
-
A
Over 20,000
-
B
Under 1,000
-
C
Exactly 5,000
-
D
Over 1,000,000
17
The process of pasteurization involves heating liquids to a temperature of about 63°C for how many minutes?
18
How many subunits comprise the 70S ribosome found in prokaryotes?
19
In 1977, Carl Woese used which specific molecule to define the Archaea domain?
-
A
16S rRNA
-
B
DNA polymerase
-
C
Mitochondrial DNA
-
D
ATP
20
How many micrometers are typically in the length of a human red blood cell?
-
A
7-8
-
B
1-2
-
C
20-30
-
D
50-60
