The gram-negative cell wall is a multilayered structure and quite complex
The gram-positive cell wall consists of primarily a single type of molecule and is often much thicker
Neither has peptidoglycan
Both have peptidoglycan
Peptidoglycan of gram negative consists of two types of sugars N-acetyl muramic acid and N- acetyl glucosamine
N-acetyl muramic acid is unique to gram negative bacteria
The peptide part of peptidoglycan consists of a small group of amino acids consisting of L-alanine, D-alanine, D-glutamic acid, and either lysine or diaminopimelic acid (DAP)
The peptidoglycan of gram negatives is thin as compared to gram positive
In gram-positive bacteria, as much as 90% of the cell wall consists of peptidoglycan, although another kind of constituent, teichoic acid is usually present in small amounts
In gram-negaitive Bacteria, as much as 90% of the cell wall consists of peptidoglycan, although another kind of constituent, teichoic acid is usually present in small amounts
Gram-negative Bacteria, have several (up to about 25) peptidoglycan layers. while gram positive has a single but thin layer
In gram-negative bacteria about 90% of the wall is peptidoglycan, the majority of the wall consisting of a complex layer
Gram-negative Bacteria contain an additional wall layer made of lipopolysaccharide.
This layer is effectively a second lipid bilayer, but it is not constructed solely of phospholipid, as is the cytoplasmic membrane; instead it contains polysaccharide and protein.
Polysaccharide consists of two portions, the core polysaccharide and the O-polysaccharide
Lipid A which linkes the core-polysaccharide prtion is antigenic
None of the above is true
Following decolourization procedure, an insoluble crystal violet-iodine complex is formed inside the cell, and this complex is extracted by alcohol from gram-negative
Gram positive bacteria have thick peptidoglycan, so insoluble complex is not able to evaporate through the pores which closes upon dehydration by alcohol
Gram positive bacteria retain the blue colour of crystal violet due to the presence of thick peptidoglycan
Gram positive bacteria retain the pink colour of safranin due to the presence of thick peptidoglycan
Here's an interesting quiz for you.