Which structure of bacteria is determied by gram staining?

Answer 1

The part of the bacterial cell that appears to play the most important role in determining whether an organism if gram-positive or not is the cell wall. it is determined by whether or not it retains the stain during testing.

Answer 2

Cell walls. The peptidoglycan of gram positive bacteria is much thicker, thus holding the Gram stain through the wash. Gram negative bacteria have two thinner walls wuth two periplasam spaces and the stain washes off these bacteria almost completely.

ok decent answer..very simple should i say.

Gram (-)

- thing PG layer

- Single peptide cross link

- outer membrane

- porins

- periplasm (periplasmic space)

-LPS

Gram (+)

-Thick PG layer

- Pentapeptide cross link

- wall and Lipo teichoic acids

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Answer 3

Gram stain binds to peptidoglycan, so bacteria with double membranes with thin peptidoglycan layers are more likely not to bind to it, so are usually gram negative, while single membraned bacteria with thick peptidoglycan layers are more likely to be gram positive.

Answer 4

The structure of bacteria that is determined by gram staining is single membrane bacteria that has a thick peptidoglycan surrounding it. When a gram stain is done on a acid-fast bacteria, it normally appears as a gram-positive bacteria.

Answer 5

In Gram+ bacteria, the dark purple crystal violet stain is retained by the thick layer of peptidoglycan which forms the outer layer of the cell.

In Gram- bacteria, the thin peptidoglycan layer in the periplasm does not retain the dark stain, and the pink safranin counterstain stains the peptidoglycan layer.

Answer 6

The cell wall gram positive bacteria contais peptoglycan which reacts with Gram's Stain and develop Purple color which is not washed by alcohol.

Pradeep Kumar

Answer 7

Peptidoglycan

Answer 8

Cell Wall