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Bacterial Cell Wall Quiz

Created by

@GratifyingKhaki

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Questions and Answers

What is the main component of bacterial cell wall?

Peptidoglycan (correct)

Teichoic acid

Mucopolysaccharide

Lipopolysaccharide

Which amino acid is present in the tetrapeptide of peptidoglycan?

D-isoglutamine (correct)

L-alanine

D-alanine

L-lysine

What is the function of teichoic acid in gram-positive bacteria?

To supply Mg+

To act as an antigenic determinant (correct)

To regulate cell division

To provide rigidity to the cell wall

What is the main difference between the cell walls of gram-positive and gram-negative bacteria?

Gram-negative bacteria have thinner peptidoglycan layer Signup and view all the answers

What is the function of Braun's lipoproteins in gram-negative bacteria?

To connect the outer membrane to peptidoglycan Signup and view all the answers

What is the function of periplasmic space in gram-positive bacteria?

To act as a storage space for nutrients Signup and view all the answers

What is the main component of the second membrane structure in gram-negative bacteria?

Lipopolysaccharide Signup and view all the answers

What is the function of porin proteins in gram-negative bacteria?

To help bacteria adjust to osmolarity Signup and view all the answers

What is the function of TonB-dependent transports in gram-negative bacteria?

To bind nutrients with high affinity and deliver them into periplasm Signup and view all the answers

What is the effect of lysozymes on bacterial cells?

They break the bonds between NAG and NAM Signup and view all the answers

What is the effect of penicillin on bacterial cells?

They inhibit peptidoglycan synthesis Signup and view all the answers

Why are gram-negative bacteria naturally resistant to large peptidoglycan targeting antibiotics such as vancomycin?

Because they have thinner peptidoglycan layer Signup and view all the answers

Study Notes

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Description

Test your knowledge on the bacterial cell wall with this quiz! Learn about the key components of a typical bacterial cell wall, including mucopolysaccharide peptidoglycan and the tetrapeptide structure. Discover how the cell wall provides rigidity through cross-linking and the differences between gram-positive and gram-negative cell walls. Challenge yourself with bonus questions on teichoic acid and other important aspects of the bacterial cell wall.