Medical Microbiology (Lec 5) (Set 1)
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Questions and Answers

Which category of microorganisms lacks cell membranes, cytoplasm, and the machinery for synthesizing macromolecules?

  • Bacteria
  • Viruses (correct)
  • Fungi
  • Protozoans

What confers protection, antigenicity, and stimulates certain pathologic responses in bacteria?

  • Flagellum
  • Nucleoid
  • Pili/fimbriae
  • Bacterial cell wall (correct)

Which category of microorganisms grow as thread-like filaments (hyphae) and can cause infections in internal organs?

  • Viruses
  • Bacteria
  • Protozoans
  • Fungi (correct)

Which category of microorganisms release enzymes to digest material externally and can cause superficial mycoses on the skin and hair?

<p>Fungi (B)</p> Signup and view all the answers

Which category of microorganisms possess genetic material (DNA or RNA) but lack cell membranes, cytoplasm, and the machinery for synthesizing macromolecules?

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

Which category of microorganisms are prokaryotes and lack a distinct nucleus?

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

Which of the following is NOT a characteristic used to classify bacteria?

<p>Color (B)</p> Signup and view all the answers

Which of the following is a method used to identify viruses?

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

Which genus is responsible for causing malaria?

<p>Plasmodium (B)</p> Signup and view all the answers

What is the most prevalent region for infections caused by protozoa?

<p>Tropical and subtropical regions (C)</p> Signup and view all the answers

Which of the following is NOT used for the identification of bacteria below genus level?

<p>Genomic sequencing (C)</p> Signup and view all the answers

Which body sites are normally sterile?

<p>Blood and bone marrow, cerebrospinal fluid (D)</p> Signup and view all the answers

What is the significance of an isolate from a certain body site?

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

What is the time required for conventional microbiological diagnosis to achieve results?

<p>Minimum 18 hours (C)</p> Signup and view all the answers

Which diagnostic technique does not require culture?

<p>PCR and oligonucleotide probes (C)</p> Signup and view all the answers

What is the definition of an opportunistic infection?

<p>An infection caused by a weakened immune system (D)</p> Signup and view all the answers

What is the difference between acute and chronic infection?

<p>Acute infection is more severe than chronic infection (A)</p> Signup and view all the answers

What is the most common cause of infection-related death in the USA and Europe?

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

True or false: Viruses are considered living organisms because they possess genetic material and cell membranes.

<p>False (B)</p> Signup and view all the answers

True or false: Bacteria are eukaryotes and have a distinct nucleus.

<p>False (B)</p> Signup and view all the answers

True or false: Fungi can cause infections in internal organs and are part of normal body flora.

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

True or false: Cryptococcus is a genus of bacteria.

<p>False (B)</p> Signup and view all the answers

True or false: Plasmodium falciparum is the species responsible for causing malaria.

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

True or false: Bacterial strains are genetic variants or subspecies.

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

True or false: Lower respiratory tract infections tend to be less severe than upper respiratory tract infections.

<p>False (B)</p> Signup and view all the answers

True or false: Pneumonia is the most common cause of infection-related death in the USA and Europe.

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

True or false: Tuberculosis primarily affects the lungs and rarely spreads to other sites in the body.

<p>False (B)</p> Signup and view all the answers

True or false: Tubercles in tuberculosis may heal spontaneously and become fibrotic or calcified.

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

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