BACTERIA MORPHOLOGY QUIZ

Which of the following has peptidoglycan as a major constituent of cell wall?

None of these

Gram-positive bacteria

Gram-negative bacteria

Fungi

TRUE ANSWER : ?
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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

β-1,6-glycosidic bond

α- 1,4-glycosidic bond

β- 1,4-glycosidic bond

α- 1,6-glycosidic bond

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Microcapsules are composed of

lipids

proteins

all of these

polysaccharides

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The structure responsible for motility of bacteria is

flagella

capsules

sheath

pilli

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The cocci which forms a chain is

Tetracocci

diplococci

Staphylococci

Streptococci

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The common word for bacteria which are spherical in shape is

pleomorphic

spirilla

bacilli

cocci

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Which is most likely to be exposed on the surface of a gram-negative bacterium?

Phospholipids

Lipoteichoic acid

Protein involved in energy generation

Pore protein (porin)

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YOUR ANSWER : ?

In eukaryotic cells, ribosomes are

70S

60S

Not specific

80S

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Peptidoglycan is also known as

murein mucopeptide

mesodiaminopimetic acid

N-acetyl muramic acid

N acetylglucosamine

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Gram positive cells have a

multiple layer of peptidoglycan that helps to retain the crystal violet stain

second outer membrane that helps to retain the crystal violet stain

thick capsule that traps the crystal violet stain

periplasmic space that traps the crystal violet

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