OVERVIEW OF THE IMMUNE SYSTEM
IMMUNITY INNATE AND ADAPTIVE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Coccus
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Bacillus
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Spirillium
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Capsule
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Detailed explanation-1: -Spirillum (plural, spirilla). A bacterium with rigid spiral (helical) structure (not easily band, not flexible), thick, long, and move with flagella, 6–15 m long and spiral in shape is called spirillum. For example, Campylobacter jejuni and Helicobacter pylori.
Detailed explanation-2: -Bacilli. Bacteria are microscopic single-celled organisms. They are usually of four types: Cocci (spherical bacteria), Bacilli (rod-shaped bacteria), Spirilla (spiral or twisted bacteria), Vibrio(comma-shaped).
Detailed explanation-3: -Bacilli (or bacillus for a single cell) are rod-shaped bacteria. Spirilla (or spirillum for a single cell) are curved bacteria which can range from a gently curved shape to a corkscrew-like spiral. Many spirilla are rigid and capable of movement.
Detailed explanation-4: -Members of the genus Spirillum are large, elongate, spiral shaped, rigid cells. Some have tufts of amphitrichous flagella at both poles. They are microaerophilic and usually found in stagnant freshwater rich in organic matter.