Bacteria Structures and Characteristics Quiz

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Questions and Answers

What type of bacteria would be best suited for growth in the environment shown in the figure?

  • Obligate anaerobes (correct)
  • Obligate aerobes
  • Microaerophiles
  • Facultative anaerobes

Which of the following bacteria is deficient in a cell wall?

  • Spirilla
  • Mycoplasma (correct)
  • Gram-positive bacteria
  • Escherichia coli

What is the term used for an organism that is killed by oxygen?

  • Obligate aerobe
  • Aerotolerant anaerobe
  • Facultative anaerobe
  • Obligate anaerobe (correct)

Which disease is characterized by catarrhal, paroxysmal, and convalescent stages?

<p>Pertussis (B)</p>
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Which method of physical control non-specifically alters proteins and nucleic acids?

<p>Radiation (C)</p>
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A patient with active tuberculosis infection is placed in ______ precautions and healthcare workers should always wear ______ when providing care.

<p>Droplet, mask (A)</p>
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Which method of microbial control physically removes microbes from samples?

<p>Filtration (B)</p>
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Which of the following chemicals is widely used as a household disinfectant and decomposes into water and oxygen gas?

<p>Hydrogen peroxide (C)</p>
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What was one of the first chemicals used by Lister to prevent surgical infections?

<p>Carbolic acid (D)</p>
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Which of the following lacks a cell wall?

<p>Mycoplasma (D)</p>
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Flashcards

Obligate anaerobes

Bacterial organisms that can only survive in the absence of oxygen and are killed by its presence.

Mycoplasma

Bacteria that lack a cell wall, making them resistant to certain antibiotics.

Pertussis

An infectious disease characterized by distinct stages: catarrhal (cold-like), paroxysmal (intense coughing fits), and convalescent (recovery).

Radiation

A method that uses electromagnetic waves to alter proteins and nucleic acids, leading to microbial inactivation.

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Droplet precautions

A control measure used in healthcare to prevent the spread of pathogens transmitted through droplets in the air, requiring the use of masks.

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Filtration

A method of microbial control that physically separates microbes from liquids or gases using filters with small pores.

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Hydrogen peroxide

A chemical compound that decomposes into water and oxygen gas and widely used as a household disinfectant.

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Carbolic acid

An early antiseptic chemical used in surgery to reduce infections. It's also known as phenol.

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