Microbiology Chapter 1: A Brief History
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Questions and Answers

Who is credited with beginning the use of simple microscopes to examine microorganisms?

  • Antoni van Leeuwenhoek (correct)
  • Carolus Linnaeus
  • Mindy Miller-Kittrell
  • Louis Pasteur

What did Antoni van Leeuwenhoek visualize using his simple microscopes?

  • Small multicellular animals
  • Tiny animals, fungi, algae, and single-celled protozoa (correct)
  • Fungi and Algae
  • Bacteria and Archaea

At the end of the 19th century, what were the microorganisms visualized by Antoni van Leeuwenhoek called?

  • Animalcules (correct)
  • Microorganisms
  • Plantcules
  • Insects

Who developed a taxonomic system for naming plants and animals, and grouping similar organisms together?

<p>Carolus Linnaeus (C)</p> Signup and view all the answers

What is the structure of nucleic acids shown in Figure 1.1?

<p>DNA double helix (C)</p> Signup and view all the answers

How many categories did Carolus Linnaeus group Leeuwenhoek's microorganisms into?

<p>Six (A)</p> Signup and view all the answers

What distinguishes bacteria and archaea from eukaryotes?

<p>They are unicellular and lack nuclei (C)</p> Signup and view all the answers

What distinguishes protozoa from other microorganisms?

<p>Capable of locomotion by pseudopods, cilia, and flagella (B)</p> Signup and view all the answers

What is a characteristic of algae?

<p>Photosynthetic (D)</p> Signup and view all the answers

Which of the following is a characteristic of fungal yeasts?

<p>Unicellular; reproduce asexually by budding (A)</p> Signup and view all the answers

Which statement is true about parasites?

<p>They live in animal hosts (D)</p> Signup and view all the answers

What is a distinguishing characteristic of viruses?

<p>Not considered living organisms (A)</p> Signup and view all the answers

What did scientists of the Golden Age of Microbiology search for answers to?

<p>All of the above (D)</p> Signup and view all the answers

Antoni van Leeuwenhoek began making and using simple ______

<p>microscopes</p> Signup and view all the answers

Carolus Linnaeus developed a taxonomic system for naming plants and animals and grouping similar organisms together, and Leeuwenhoek's microorganisms were grouped into six ______

<p>categories</p> Signup and view all the answers

By the end of the 19th century, the microorganisms visualized by Antoni van Leeuwenhoek were called ______

<p>microorganisms</p> Signup and view all the answers

Leeuwenhoek's microscopes often made a new microscope for each ______

<p>specimen</p> Signup and view all the answers

Leeuwenhoek examined water and visualized tiny animals, fungi, algae, and single-celled ______; "animalcules"

<p>protozoa</p> Signup and view all the answers

The structure of ______ acids

<p>nucleic</p> Signup and view all the answers

Bacteria and Archaea are ______ and lack nuclei

<p>unicellular</p> Signup and view all the answers

Archaeal cell walls composed of polymers other than ______

<p>peptidoglycan</p> Signup and view all the answers

Bacterial cell walls contain ______; some lack cell walls

<p>peptidoglycan</p> Signup and view all the answers

Much smaller than ______

<p>eukaryotes</p> Signup and view all the answers

Fungi are ______ (have membrane-bound nucleus)

<p>eukaryotic</p> Signup and view all the answers

Molds – ______; grow as long filaments; reproduce by sexual and asexual spores

<p>multicellular</p> Signup and view all the answers

Yeasts – ______; reproduce asexually by budding; some produce sexual spores

<p>unicellular</p> Signup and view all the answers

Protozoa are single-celled ______

<p>eukaryotes</p> Signup and view all the answers

Most are capable of locomotion by ______ – cell extensions that flow in direction of travel

<p>pseudopods</p> Signup and view all the answers

Algae are unicellular or ______

<p>multicellular</p> Signup and view all the answers

Flashcards

Who started using simple microscopes to examine microorganisms?

Antoni van Leeuwenhoek used simple microscopes to examine microorganisms.

What did Antoni van Leeuwenhoek visualize?

Antoni van Leeuwenhoek used his microscopes to visualize tiny animals (protozoa), fungi, algae, and single-celled protozoa.

What were microorganisms called in the late 19th century?

By the end of the 19th century, the microorganisms visualized by Antoni van Leeuwenhoek were called 'animalcules'.

Who is credited with developing a taxonomic system?

Carolus Linnaeus developed a taxonomic system for naming plants and animals and grouping similar organisms together.

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How many microorganism categories did Linnaeus create?

Carolus Linnaeus grouped Leeuwenhoek's microorganisms into six categories.

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What distinguishes bacteria and archaea from eukaryotes?

Bacteria and archaea are different from eukaryotes because they are unicellular and lack nuclei.

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What distinguishes protozoa from other microorganisms?

Protozoa are unique because they can move using structures like pseudopods, cilia, and flagella.

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What is a characteristic of algae?

Algae are photosynthetic, meaning they can make their own food using sunlight.

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What are characteristics of fungal yeasts?

Fungal yeasts are unicellular and reproduce asexually by budding.

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What is a characteristic of parasites?

Parasites live in animal hosts and rely on them for survival.

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What distinguishes viruses?

Viruses are not considered living organisms because they cannot reproduce or carry out metabolic processes on their own.

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What were scientists focused on during the Golden Age of Microbiology?

The Golden Age of Microbiology aimed to answer questions about the role of microorganisms in human health, disease, and the environment.

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What kind of microscopes did Leeuwenhoek use?

Antoni van Leeuwenhoek used simple microscopes to examine microorganisms.

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How were Leeuwenhoek's microorganisms grouped?

Carolus Linnaeus organized Leeuwenhoek's microorganisms into six categories.

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What were Leeuwenhoek's visualized microorganisms called?

By the end of the 19th century, the microorganisms visualized by Antoni van Leeuwenhoek were called microorganisms.

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How did Leeuwenhoek examine different specimens?

Leeuwenhoek often made a new microscope for each specimen he examined.

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What did Leeuwenhoek visualize in water?

Leeuwenhoek examined water and visualized tiny animals (protozoa), fungi, algae, and single-celled protozoa.

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What is the structure of nucleic acids like?

The structure of nucleic acids is a double helix.

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What are the basic characteristics of bacteria and archaea?

Bacteria and archaea are unicellular, which means they are made of a single cell, and lack nuclei.

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What are archaeal cell walls made of?

Archaeal cell walls are composed of polymers other than peptidoglycan.

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What are bacterial cell walls made of?

Bacterial cell walls contain peptidoglycan; some lack cell walls.

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How do bacteria and archaea compare in size to eukaryotes?

Bacteria and archaea are much smaller than eukaryotes.

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What type of cells do fungi have?

Fungi are eukaryotic, meaning they have a membrane-bound nucleus.

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What are characteristics of molds?

Molds are multicellular and grow as long filaments; they reproduce by sexual and asexual spores.

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What are characteristics of yeasts?

Yeasts are unicellular and reproduce asexually by budding; some produce sexual spores.

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What is the basic structure of protozoa?

Protozoa are single-celled eukaryotes.

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How do protozoa move?

Many protozoa can move using pseudopods, cell extensions that flow in the direction of travel.

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What are the possible structures of algae?

Algae can be unicellular or multicellular.

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Study Notes

The Beginning of Microbiology

  • Antoni van Leeuwenhoek is credited with beginning the use of simple microscopes to examine microorganisms.
  • He visualized tiny animals, fungi, algae, and single-celled organisms (animalcules) in water using his simple microscopes.
  • Carolus Linnaeus developed a taxonomic system for naming plants and animals and grouping similar organisms together.
  • Leeuwenhoek's microorganisms were grouped into six categories by Linnaeus.
  • By the end of the 19th century, the microorganisms visualized by Antoni van Leeuwenhoek were called microorganisms.
  • Leeuwenhoek's microscopes were often made specifically for each specimen he examined.

Microbial Structure & Function

  • The structure of nucleic acids is shown in Figure 1.1.
  • Bacteria and Archaea are prokaryotes and lack nuclei.
  • Archaeal cell walls are composed of polymers other than peptidoglycan.
  • Bacterial cell walls contain peptidoglycan; some lack cell walls.
  • Viruses are much smaller than prokaryotes and eukaryotes.
  • Fungi are eukaryotes (have a membrane-bound nucleus).
  • Molds grow as long filaments and reproduce by sexual and asexual spores.
  • Yeasts reproduce asexually by budding; some produce sexual spores.
  • Protozoa are single-celled eukaryotes.
  • Most protozoa are capable of locomotion by pseudopods - cell extensions that flow in the direction of travel.
  • Algae are unicellular or multicellular.

Parasites and Their Characteristics

  • Parasites live at the expense of another organism (host).

The Golden Age of Microbiology

  • Scientists of the Golden Age of Microbiology searched for answers to:
    • What causes fermentation and disease?
    • How can we prevent and treat disease?

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Description

Test your knowledge of Chapter 1: A Brief History of Microbiology with this quiz. Explore the early years of microbiology, including the work of Antoni van Leeuwenhoek and the visualization of tiny organisms. This quiz is based on PowerPoint® Lecture Presentations prepared by Mindy Miller-Kittrell from North Carolina State University.

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