Microbiology Chapter 1: A Brief History

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

Antoni van Leeuwenhoek

What did Antoni van Leeuwenhoek visualize using his simple microscopes?

Tiny animals, fungi, algae, and single-celled protozoa

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

Animalcules

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

Carolus Linnaeus

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

DNA double helix

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

Six

What distinguishes bacteria and archaea from eukaryotes?

They are unicellular and lack nuclei

What distinguishes protozoa from other microorganisms?

Capable of locomotion by pseudopods, cilia, and flagella

What is a characteristic of algae?

Photosynthetic

Which of the following is a characteristic of fungal yeasts?

Unicellular; reproduce asexually by budding

Which statement is true about parasites?

They live in animal hosts

What is a distinguishing characteristic of viruses?

Not considered living organisms

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

All of the above

Antoni van Leeuwenhoek began making and using simple ______

microscopes

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

categories

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

microorganisms

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

specimen

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

protozoa

The structure of ______ acids

nucleic

Bacteria and Archaea are ______ and lack nuclei

unicellular

Archaeal cell walls composed of polymers other than ______

peptidoglycan

Bacterial cell walls contain ______; some lack cell walls

peptidoglycan

Much smaller than ______

eukaryotes

Fungi are ______ (have membrane-bound nucleus)

eukaryotic

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

multicellular

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

unicellular

Protozoa are single-celled ______

eukaryotes

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

pseudopods

Algae are unicellular or ______

multicellular

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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