15 JANUARY 2021 CURRENT AFFAIRS QUIZ

The cooci which mostly occur in single or pairs are

Streptococci

None of these

Tetracocci

Diplococci

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following does not contain protein?

Porin

Lipoteichoic acid

Pili

Flagellum

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is true about cell wall of gram-positive bacteria?

It is thicker than that associated with gram-negative bacteria

All of these

It consists of multiple layers

It contains teichoic acids

TRUE ANSWER : ?
YOUR ANSWER : ?

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

flagellin

gelatin

casein

keratin

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Mycoplasmas

Cyanobacteria

Bdellovibrios

Spirochetes

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Gram-positive bacteria

Fungi

Gram-negative bacteria

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemotaxis is a phenomenon of

swimming towards a bacteria

swimming away or towards of bacteria in presence of chemical compound

None of these

swimming away of bacteria

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Braun lipoprotein

Electron transport system components

Polysaccharide portion of lipoteichoic acid (LTA)

O-antigen of lipopolysaccharide (LPS)

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemically the capsule may be

polypeptide

either (a) or (b)

polysaccharide

none of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The next to last step in peptidoglycan biosynthesis is

removal of the subunit from bactoprenol

cross-linking the peptide side chains of peptidoglycan

linking the sugar of the disaccharide-peptide unit to the growing peptidoglycan chain

synthesis of the NAM-peptide subunit

TRUE ANSWER : ?
YOUR ANSWER : ?