6 Questions
Which of the following methods is used to determine the genetic characteristics of bacteria?
rRNA typing
What is the singular form of 'cocci'?
Coccus
What size range do bacteria generally fall into?
0.2µm to 10µm
Which of the following is NOT a shape of bacteria?
Diploid
Which characteristic is detected using Gram and acid-fast staining techniques?
Staining characteristics
Which of the following is not a growth characteristic used in bacterial classification?
Shape
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
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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