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Bacteria Morphology

Bacteria Morphology
Peptidoglycan accounts for __________ of the dry weight of cell wall in many gram positive bacteria

About 20%
11%+ 0.22%
About 10%
50% or more

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Bacteria Morphology
Which of the following is exposed on the outer surface of a gram-negative bacterium?

O-antigen of lipopolysaccharide (LPS)
Polysaccharide portion of lipoteichoic acid (LTA)
Braun lipoprotein
Electron transport system components

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Bacteria Morphology
Which of the following is true about cell wall of gram-positive bacteria?

It contains teichoic acids
It consists of multiple layers
All of these
It is thicker than that associated with gram-negative bacteria

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Bacteria Morphology
Which of the following structure(s) is /are external to cell wall?

Stalks
Sheath
Flagella
All of these

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Bacteria Morphology
Single or clusters of flagella at both poles is known as

none of these
monotrichous
amphitrichous
petritrichous

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Bacteria Morphology
The protein from which hook and filaments of flagella are composed of, is

flagellin
gelatin
casein
keratin

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