BACTERIA MORPHOLOGY QUIZ

Which of the following is analogous to mesosomes of bacteria?

None of these

Mitochondria of eukaryotes

Golgi apparatus of eukaryotes

Lysosomes of eukaryotes

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Stalks

All of these

Flagella

Sheath

TRUE ANSWER : ?
YOUR ANSWER : ?

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

About 10%

50% or more

About 20%

11%+ 0.22%

TRUE ANSWER : ?
YOUR ANSWER : ?

Swimming towards a chemical of bacteria is termed as

positive chemotaxis

phototaxis

magnetotaxis

negative chemotaxis

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following bacteria lack a cell wall and are therefore resistant to penicillin?

Spirochetes

Cyanobacteria

Bdellovibrios

Mycoplasmas

TRUE ANSWER : ?
YOUR ANSWER : ?

In which of the following, lipo-polysaccharide is a major constituent of outer membrane of the cellwall?

Fungi

None of these

Gram-positive bacteria

Gram-negative bacteria

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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-1,6-glycosidic bond

α- 1,6-glycosidic bond

β- 1,4-glycosidic bond

TRUE ANSWER : ?
YOUR ANSWER : ?

The cocci which forms a chain is

Tetracocci

Staphylococci

Streptococci

diplococci

TRUE ANSWER : ?
YOUR ANSWER : ?

The cocci which forms a bunch and irregular pattern are

diplococci

Tetracocci

Staphylococci

Streptococci

TRUE ANSWER : ?
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Gram positive cells have a

periplasmic space that traps the crystal violet

second outer membrane that helps to retain the crystal violet stain

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

thick capsule that traps the crystal violet stain

TRUE ANSWER : ?
YOUR ANSWER : ?

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