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What chemical associated with the cell wall gives gram - positive bacteria its final color?
Wiki User
∙ 12y ago
Gram-positive bacteria have much thicker peptidoglycan layers than do gram-negative ones. When you apply the crystal violet dye, the molecules are small enough to penetrate the cell walls of all bacteria. Then, the addition of iodine makes the dye molecules too large to pass through thick peptidoglycan. The violet dye gets trapped inside only the gram-positive bacteria.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoThick layer of peptidoglycan. Gram-positive bacteria retain a crystal violet-iodine complex and stain blue-purple.
Source: Bio Lab Manual Mader 10th Edition
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Is lactobacillus casei is a gram negative bacteria or gram positive?
The Bacteria Sarcina lutea is Gram Positive Because If You Perform the Gram Test It Will Turn The Violet Color Which indicates It's Positiveness. What Makes It Positive Is the Peptidoglycan Located Within The The Bacterium
What is the color of Gram positive bacteria and why?
Gram positive bacteria stain purple due to the chemistry and structure of their petidoglycan cell wall
What would be the result of over destaining on gram-positive types?
Over destaining can cause the purple color from the gram positive bacteria to be washed away, so when you apply the safrinin the gram positive bacteria will take up a pink color causing gram positive bacteria to appear gram negative.
What color is gram-negative stain?
Red or pink. Gram Positive = Purple or Violet, Gram Negative = Red or Pink. I just think of the mnemonic Positive-Purple both starting with P.
What is Gram staining method used for?
the purpose is to determine diffrent kinds of bacteria based on their results. if it'sgram positive the color will be pink and if it is gram negative the color will be red.
Is lactobacillus casei is a gram negative bacteria or gram positive?
The Bacteria Sarcina lutea is Gram Positive Because If You Perform the Gram Test It Will Turn The Violet Color Which indicates It's Positiveness. What Makes It Positive Is the Peptidoglycan Located Within The The Bacterium
What is the color of Gram positive bacteria and why?
Gram positive bacteria stain purple due to the chemistry and structure of their petidoglycan cell wall
Do gram-positive cells carry a net positive charge?
Gram-positive does not refer to a positive charge, but to the purple color of the stain. Gram-negative bacteria do not retain the purple dye and are instead red in color.
What would be the result of over destaining on gram-positive types?
Over destaining can cause the purple color from the gram positive bacteria to be washed away, so when you apply the safrinin the gram positive bacteria will take up a pink color causing gram positive bacteria to appear gram negative.
What is the advantage of the gram stain over the simple stain?
gram staining differentiates between gram negative and gram positive bacteria by showing different colors. it shows blue or purple like color for gram positive bacteria and red color for gram negative bacteria. where as simple stain gives the same color to all the types of bacteria. hence it is difficult to differentiate between them.
What color associated with charge does DNA move towards in a gel electrophoresis box?
it is positive
What is the color for positive?
There is no color traditionally associated with the trait "positive." Some colors, like green for go or blue for sadness, just seem to match up to a word, but nobody's ever done that with positive.
What color is gram-negative stain?
Red or pink. Gram Positive = Purple or Violet, Gram Negative = Red or Pink. I just think of the mnemonic Positive-Purple both starting with P.
What color indicate positive mannitol test?
Yellow, which means bacteria is able to produce acids from mannitol fermentation
What is Gram staining method used for?
the purpose is to determine diffrent kinds of bacteria based on their results. if it'sgram positive the color will be pink and if it is gram negative the color will be red.
What does gram negative on a serratia marcescens gram stain mean?
Bacteria are gram positive or gram negative. Serratia happens to be a gram negative bacteria. They appear pink on a gram stain. Gram positive bacteria stain to a purple color on a gram stain. We can classify and ID bacteria using their gram stain and shape. Some antibiotics only work on gram negative bacteria and some only work on gram positive bacteria. It helps a doctor know which antibiotic to use.
What is the color of staphylococcus aureus after gram staining?
Post ID Special:Contributionssaid: "blue-violet.....because it is a gram-negative bacteria"Wrong...the color is correct, but S. aureus is gram-POSITIVE.
