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Microbiology
Learn the toughest concepts covered in Microbiology with step-by-step video tutorials and practice problems by world-class tutors.
7. Prokaryotic Cell Structures & Functions
Introduction to Bacterial Cell Walls
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1
concept
Introduction to Bacterial Cell Walls
3m
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2
Problem
Which is (are) true concerning the cell wall of prokaryotes?
A
It determines the shape of the bacteria.
B
It is part of the cell envelope.
C
It prevents the bacteria from bursting.
D
All of the choices are true.
3
concept
Peptidoglycan
1m
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4
Problem
The peptidoglycan molecule is responsible for the:
A
Entry and exit of molecules into and from the cell.
B
Flexibility of the cytoplasmic membrane.
C
Motility of the bacterial cell.
D
Genetic characteristics of the bacterial cell.
E
Semi-rigid cell wall structure of prokaryotes.
5
concept
Peptidoglycan Structure
4m
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6
Problem
Peptidoglycan is made up of:
A
N-acetylglucosamine
B
N-acetylmuramic acid & N-acetylglucosamine
C
N-acetylmuramic acid, N-acetylglucosamine, & amino acids
D
N-acetylmuramic acid, N-acetylglucosamine, & phospholipids
E
N-acetylmuramic acid, N-acetylglucosamine, & ribosomes
7
Problem
The NAG and NAM molecules of peptidoglycan are connected by a:
A
A tripeptide chain
B
β-(1,4) glycosidic linkage
C
A disulfide bridge
D
β-(1,6) glycosidic linkage
E
A phosphodiester linkage
8
concept
Peptide Interbridge
2m
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9
Problem
The glycan chains of adjacent peptidoglycan molecules are connected by:
A
A sugar backbone
B
Phosphodiester linkage
C
A lipid bilayer
D
Polypeptide chain crosslinking
E
Disulfide linkages
10
concept
Gram-Positive & Gram-Negative Bacteria
2m
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11
Problem
The Gram stain works because of differences in the ________ of bacteria.
A
Genetic characteristics
B
Cell membranes
C
Cell walls
D
Capsules
12
concept
Types of Bacterial Cell Walls
2m
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