BACTERIA MORPHOLOGY QUIZ

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

Electron transport system components

O-antigen of lipopolysaccharide (LPS)

Polysaccharide portion of lipoteichoic acid (LTA)

Braun lipoprotein

TRUE ANSWER : ?
YOUR ANSWER : ?

The cooci which mostly occur in single or pairs are

None of these

Streptococci

Diplococci

Tetracocci

TRUE ANSWER : ?
YOUR ANSWER : ?

In eukaryotic cells, ribosomes are

70S

60S

Not specific

80S

TRUE ANSWER : ?
YOUR ANSWER : ?

Name the component of flagellum.

Filament

All of these

Basal body

Hook

TRUE ANSWER : ?
YOUR ANSWER : ?

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

About 10%

About 20%

50% or more

11%+ 0.22%

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Peptidoglycan

Penicillin binding protein

Lipopolysaccharide

Phospholipid bilayer membrane

TRUE ANSWER : ?
YOUR ANSWER : ?

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

flagellin

keratin

gelatin

casein

TRUE ANSWER : ?
YOUR ANSWER : ?

A cluster of polar flagella is called

monotrichous

lophotrichous

petritrichous

amphitrichous

TRUE ANSWER : ?
YOUR ANSWER : ?

The cell wall of

gram-positive bacteria are thicker than gram-negative bacteria

none of these

both have same thickness but composition is different

gram-negative bacteria are thicker than gram-positive bacteria

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following does not contain protein?

Porin

Lipoteichoic acid

Flagellum

Pili

TRUE ANSWER : ?
YOUR ANSWER : ?