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Bacteria Morphology

Bacteria Morphology
The bacteria deficient in cell wall is

Klebsiella
Mycoplasma
Staphylococcus
Treponema

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

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

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

Flagella
Stalks
All of these
Sheath

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

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

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Bacteria Morphology
Cyanobacteria have

Neither (a) nor (b)
No cell wall
a gram-positive cell wall
a gram-negative cell wall

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Bacteria Morphology
The cell walls of Gram positive bacteria contain two modified sugar, viz. N- acetylgucosamine (NAG) and N- acetylmuramic acid (NAM). They are covalently linked by

α- 1,4-glycosidic bond
β- 1,4-glycosidic bond
β-1,6-glycosidic bond
α- 1,6-glycosidic bond

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