Microbiology: Bacterial Classification and Morphology
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Questions and Answers

Which of the following methods is used to determine the genetic characteristics of bacteria?

  • HPLC
  • Serological tests
  • Gram staining
  • rRNA typing (correct)

What is the singular form of 'cocci'?

  • Cocc
  • Coccus (correct)
  • Coccia
  • Coccum

What size range do bacteria generally fall into?

  • 1µm to 100µm
  • 100µm to 1000µm
  • 0.2µm to 10µm (correct)
  • 0.02µm to 1µm

Which of the following is NOT a shape of bacteria?

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

Which characteristic is detected using Gram and acid-fast staining techniques?

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

Which of the following is not a growth characteristic used in bacterial classification?

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

Study Notes

Bacterial Classification

  • Bacterial classification involves biochemical profile, serological tests, metabolic end products, genetic analysis, G-C content, and staining characteristics like Gram and acid-fast staining.

Bacterial Morphology

  • Bacteria can be classified into different shapes:
    • Cocci (singular: coccus)
    • Bacilli (singular: bacillus) or rods
  • Other shapes include:
    • Ovoid
    • Tapered
    • Curved
    • Spiral
    • Hyphae-like structures

Bacterial Size

  • Bacteria range in size from 0.2µm (Chlamydiae) to 10µm
  • The smallest bacteria are at the limit of resolution of the light microscope

Cellular Arrangements

  • Bacteria can form different arrangements:
    • Clusters
    • Chains
    • Diploid
    • Tetrads
    • Palisades

Other Characteristics

  • Motility: presence or absence of movement
  • Spore formation: presence or absence of spores
  • Growth characteristics:
    • Speed of growth
    • Morphology on selective and non-selective media
    • Atmospheric requirements
    • Temperature requirements

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Description

This quiz covers the classification of bacteria based on biochemical profiles, serological tests, and genetic analysis, as well as their morphology and arrangement. It also touches on bacterial size and shapes.

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