Questions and Answers
Which of the following are the 3 basic bacterial shapes?
What unit is used to measure bacterial size?
micrometer
What does coccus mean?
spherical, circles
Which of the following are arrangements of cocci? (Select all that apply)
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What is the pattern of streptococci?
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What is the arrangement of staphylococci?
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What does diplococci refer to?
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What are tetrads in bacterial arrangements?
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What shape is bacillus?
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What are the arrangements of bacillus? (Select all that apply)
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What describes streptobacilli?
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What are coccobacilli?
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What does spiral bacteria look like?
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Which of the following are arrangements of spiral bacteria? (Select all that apply)
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What describes vibrio bacteria?
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What distinguishes spirilla?
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What is a spirochete?
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Study Notes
Basic Bacterial Shapes
- Bacteria have three fundamental shapes: coccus (spherical), bacillus (rod-shaped), and spiral (twisted).
Measurement of Size
- Bacterial size is commonly measured in micrometers (µm).
Cocci (Plural: Cocci)
- Cocci are spherical bacteria, resembling circles in shape.
Arrangements of Cocci
- Cocci can arrange in various formations, including:
- Streptococcus: chainlike clusters.
- Staphylococcus: grapelike clusters or broad sheets.
- Diplococci: pairs of cocci.
- Tetrads: groups of four cocci.
Bacillus
- Bacillus bacteria are characterized by their rod-like shape.
Arrangements of Bacillus
- Bacillus can form specific arrangements such as:
- Streptobacilli: chains of rod-shaped bacteria.
- Coccobacilli: short and plump; oval in shape, exhibiting characteristics of both rods and spheres.
Spiral Bacteria
- Spiral bacteria are cylindrical and twisted, never appearing straight.
Arrangements of Spiral Bacteria
- Spiral bacteria include:
- Vibrio: curved or bent rods.
- Spirilla: helical shape, resembling corkscrews; they have rigid bodies and move with flagella.
- Spirochete: helical and flexible; they move using axial filaments tucked inside a flexible external sheath.
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Description
Explore the fundamental shapes and arrangements of bacteria through these informative flashcards. This quiz covers key terms such as coccus, bacillus, and spiral, as well as various arrangements including streptococcus and staphylococcus. Perfect for students studying microbiology or related fields.
