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Questions and Answers
What is the typical size range of microorganisms discussed in microbiology?
What is the typical size range of microorganisms discussed in microbiology?
- 1 µm to 100 µm
- 0.01 µm to 1 µm
- 0.1 µm to 10 µm (correct)
- 1 nm to 1 mm
Which of the following organisms is the smallest free-living bacterium?
Which of the following organisms is the smallest free-living bacterium?
- Nanoarchaeum equitans
- Corynebacterium diphtheriae
- Pelagibacter ubique (correct)
- Escherichia coli
What is the diameter of the smallest micrometre organism mentioned?
What is the diameter of the smallest micrometre organism mentioned?
- 0.1 µm
- 0.12 µm (correct)
- 1 µm
- 0.4 µm
Why are eucaryotes generally not the focus of this course?
Why are eucaryotes generally not the focus of this course?
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What distinguishes viruses from bacteria and archaea in microbiology?
What distinguishes viruses from bacteria and archaea in microbiology?
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Study Notes
Microbiology
- The study of organisms too small for the naked eye.
- Primarily focuses on prokaryotes and viruses.
- Organisms are measured in micrometers (µm) which are 10-3 mm or 10-6 m.
Size of Microorganisms
- Smallest known free-living bacteria is Pelagibacter ubique, measuring 0.4 µm long and 0.12 µm in diameter.
- Smallest known microbe is Nanoarchaeum equitans, measuring 0.4 µm in diameter.
- Common bacterium Escherichia coli (E. coli) is larger, measuring 4 µm long and 1.5 µm in diameter.
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Description
This quiz explores the fascinating world of microorganisms, particularly focusing on their sizes and the distinctions between different types. Learn about the smallest known bacteria and the common E. coli while understanding the measurement scales used in microbiology.
