01
True or false
1 point
True or false: Because viruses contain genetic material, they belong to one of the three domains of life.
Free Practice Quiz Question List
1 Introduction to Microbiology Online Quiz Questions
Use this free practice quiz with 20 questions to review 1 Introduction to Microbiology, test your knowledge, and prepare for your next test or exam.
20 questions
02
Choose one
1 point
A baker uses yeast to make bread dough rise. Which microbial activity best explains this effect?
- A
It consumes all the oxygen in the dough.
- B
It produces carbon dioxide.
- C
It converts the dough into a network of filaments.
- D
It pasteurizes the dough.
03
Fill in the blank
1 point
Viruses can reproduce only by using .
04
Written response
1 point
What term refers collectively to the microbial communities living on and inside people?
05
Choose all
1 point
Which groups listed below are eukaryotes? Select all correct answers.
- A
Bacteria
- B
Archaea
- C
Fungi
- D
Protists
- E
Viruses
06
Choose one
1 point
A student assumes that archaea can live only in extreme environments. Which correction is most accurate?
- A
They occur only in deep oceans.
- B
They occur only in hot springs and other extreme environments.
- C
They inhabit a broad range of environments, including non-extreme ones.
- D
They are all parasites of animals.
07
True or false
1 point
True or false: If a microbe is harmless in one setting, it must be harmless in every other setting.
- A
True
- B
False
08
Fill in the blank
1 point
Most bacteria have cell walls containing .
09
Written response
1 point
What term describes a microbe that causes infectious disease?
10
Choose all
1 point
Which are ways microbes contribute to ecosystem function? Select all correct answers.
- A
Decomposing dead organisms and waste
- B
Driving major cycles of elements such as carbon and nitrogen
- C
Contributing to food webs through photosynthesis
- D
Replacing the need for all other organisms in food webs
11
Choose one
1 point
Which contribution is associated with Robert Koch’s work in the development of microbiology?
- A
He provided evidence linking particular microbes to specific diseases.
- B
He first used fermentation to make bread and cheese.
- C
He showed that all microbes cause disease.
- D
He invented the first microscope.
12
Open ended
1 point
A community is considering microbial methods to manage wastewater and pollution. Explain two ways microbes can contribute to these environmental tasks.
13
Choose one
1 point
Louis Pasteur developed pasteurization. What was its purpose?
- A
To make food ferment without microbes
- B
To reduce spoilage
- C
To classify microbes into domains
- D
To make fungi form filaments
14
Written response
1 point
How do molds grow, according to their characteristic structure?
15
True or false
1 point
People used fermentation to make bread, cheese, and fermented drinks for thousands of years before they knew microbes existed. True or false?
- A
True
- B
False
16
Written response
1 point
What term describes a microbe that causes infectious disease?
17
Choose one
1 point
A microscopic eukaryote grows as a network of filaments. Which group best fits this description?
- A
A yeast
- B
A mold
- C
A virus
- D
An archaeon
18
Choose one
1 point
An infectious agent contains genetic material in a protein coat and cannot reproduce unless it enters a host cell. Which description best classifies it?
- A
It has a nucleus and reproduces independently.
- B
It is a single-celled prokaryote with peptidoglycan in its cell wall.
- C
It is an acellular infectious agent that uses a host cell's machinery to reproduce.
- D
It is a multicellular fungus that absorbs nutrients from its surroundings.
19
Choose one
1 point
Why are parasitic worms studied in microbiology even though adult worms may be large enough to see without a microscope?
- A
Their eggs or larvae may be microscopic, or the worms may cause infectious disease.
- B
All adult helminths are too small to see without a microscope.
- C
Helminths are prokaryotes whose DNA is not enclosed in a nucleus.
- D
Helminths are acellular agents that reproduce using host-cell machinery.
20
Choose one
1 point
A microbe is harmless in one part of a person's body but causes illness in another setting. Which principle best explains this difference?
- A
A microbe that is harmless in one setting cannot cause illness in any other setting.
- B
Every microbe living on or inside a person is a pathogen.
- C
A microbe's effect depends only on whether it is a bacterium or a fungus.
- D
A microbe's effect can vary with its location and interactions with its host.