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Cell Wall

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Questions
Answers
show A: Peptidoglycan (PTG)  
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Q: What is the basic structure of peptidoglycan (PTG)?   show
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Q: The cell wall of gram positive bacteria is made up of how many layers of peptidoglycan (PTG)?   show
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show A: Teichoic acid.  
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Q: The cell wall of gram negative bacteria is made up of how many layers of peptidoglycan (PTG)?   show
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Q: The peptidoglycan (PTG) of gram negative bacteria can be found where?   show
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Q: True or false? In gram positive bacteria peptidoglycan (PTG) is sandwiched between an outer membrane and the cytoplasmic membrane.   show
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show A: Secreted proteins and proteins of the ABC transport system.  
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Q: The cell wall of gram negative bacteria has an outer membrane. What is it made of?   show
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show A: Porins.  
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Q: The outer cell membrane of gram negative bacteria has two portions, an inner and an outer. What are these portions called?   show
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Q: True or false? Lipid A is considered an endotoxin.   show
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show A: Because lipid A is an endotoxin.  
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show A: Lipid A.  
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Q: Which part of the outer membrane is used to identify certin species or strains?   show
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show A: True!  
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show A: Penicillin is more effective against gram positive due to increased concentration of peptidoglycan (PTG).  
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show A: False! There are Penicillin derivatives produced to protect against gram negative bacteria.  
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show A: Lysozymes are produced in many body fluids including tears and saliva.  
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show A: Lysozymes destroy the integrity of the cell wall by breaking the bond linking NAG and NAM.  
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show A: Protease and nuclease.  
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Q: What accounts for differences in staining characteristics of gram negative and gram positive bacteria?   show
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show A: Gram positive will be purple and gram negative will be pink.  
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show A: False! Some bacteria naturally lack a cell wall.  
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Q: If a bacterium lacks a cell wall, what is responsible for maintaining the cell shape?   show
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show A: Mycoplasma.  
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Q: Does Penicillin have any effect on mycoplasma? Why or why not?   show
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Q: True or false? Bacteria in domain Archae contain peptidoglycan.   show
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Q: What causes the mild form of pneumonia known as "walking pneumonia"?   show
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show A: Glycocalyx (glyco = sugar / calyx = shell).  
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show A: The capsule and the slime layer.  
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show A: True!  
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show A: True!  
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Q: Chemical composition of capsules and slime layers varies depending on bacterial species but most are made up of _______.   show
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This MICROBIOLOGY stack covers the section of chapter 3 entitled CELL WALL.   show
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Created by: PCC Microbiology
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