BACTERIA MORPHOLOGY QUIZ

Which of the following is not true about peptidoglycan?

It is a polymer consisting of N-acetyl glucosamine, N-acetyl muramic acid and amino acids (alanine, lysine, etc.)

It occurs in the form of a bag shaped macro molecule surrounding the cytoplasm membrane

It is present in prokaryotic cell wall

None of these

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The common word for bacteria which are straight rod in shape is

cooci

bacilli

spirilla

pleomorphic

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

Stalks

Sheath

All of these

Flagella

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The other name for peptidoglycan is

both (a) & (b)

murein

none of these

mucopeptide

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A cluster of polar flagella is called

monotrichous

lophotrichous

amphitrichous

petritrichous

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A single polar flagella is known as

monotrichous

amphitrichous

lophotrichous

none of these

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Which of the following may be most likely to be missing from a gram-positive bacterium?

Lipopolysaccharide

Peptidoglycan

Penicillin binding protein

Phospholipid bilayer membrane

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Cyanobacteria have

a gram-positive cell wall

No cell wall

a gram-negative cell wall

Neither (a) nor (b)

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Name the component of flagellum.

All of these

Basal body

Hook

Filament

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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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