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it is talking about different colors different types of bacterium turn when stained a certain color depending on cell wall/membrane thickness 'purple cocci' is referring to a round bacteria which in this case thick cell wall/membranes because of its darker color, 'pink rods' is referring to rod or stick-like bacteria which in this case have thin cell wall/membranes because of their color
the darker the stain color is on the bacteria/cell/protist/etc. the thicker the wall/membrane is
What else can I help you with?
Does yogurt stain gram positive or gram negative?
Yogurt contains mostly lactic acid bacteria, which are Gram-positive bacteria. This means they will stain purple under a Gram stain.
Is S epidermidis gram negative or gram positive?
S. epidermidis is a Gram-positive bacterium. It appears purple when subjected to a Gram stain due to its thick peptidoglycan layer in the cell wall.
You preformed a gram stain on a sample from a pure culture of bacteria and observed a field of red and purple cocci adjacent cells were not always the same color what do you conclude?
This is a Gram Stain. If the technique was proper, the red rods are Gram-negative and the purple cocci are Gram-positive. This staining technique is used to help identify various bacteria. The Gram-positive bacteria that are purple hold the stain due to it's layered cell membrane. It contains a peptidoglycan layer that acts as a lattice trapping the crystal violet-Iodine dye complex.
Why do all cells stain purple in the flagella stain but not in the gram stain?
In the flagella stain, all cells appear purple due to the basic dyes used to stain the flagella. This uniform coloration helps visualize the flagella structure under the microscope. In contrast, the Gram stain uses a series of dyes to differentiate between Gram-positive (purple) and Gram-negative (pink) cells based on their cell wall composition.
Why do gram positive bacteria stain purple in the Gram staining technique?
Gram positive bacteria stain purple in the Gram staining technique because they have a thick layer of peptidoglycan in their cell walls, which retains the crystal violet dye used in the staining process.
What is the conclusion of a gram stain of purple rods and cocci through a microscope?
This is a Gram Stain. If the technique was proper, the red rods are Gram-negative and the purple cocci are Gram-positive. This staining technique is used to help identify various bacteria. The Gram-positive bacteria that are purple hold the stain due to it's layered cell membrane. It contains a peptidoglycan layer that acts as a lattice trapping the crystal violet-Iodine dye complex.
Does presence of gram negative cocci in sputum gram stain means tuberculosis?
No, the presence of gram-negative cocci in sputum gram stain does not necessarily indicate tuberculosis. Tuberculosis is caused by the bacterium Mycobacterium tuberculosis, which is acid-fast and appears pink on a Ziehl-Neelsen stain. Gram-negative cocci are more commonly associated with other bacterial infections, such as Haemophilus influenzae or Moraxella catarrhalis.
What shape is pneumonia?
It is purple. The bacteria that cause it are gram-positive, which means that under the gram stain they become purple. Your lungs produce the lung stain when they are sick, so pneumonia is purple.
Does yogurt stain gram positive or gram negative?
Yogurt contains mostly lactic acid bacteria, which are Gram-positive bacteria. This means they will stain purple under a Gram stain.
Is S epidermidis gram negative or gram positive?
S. epidermidis is a Gram-positive bacterium. It appears purple when subjected to a Gram stain due to its thick peptidoglycan layer in the cell wall.
What is the color of cocci?
Cocci, which are spherical bacteria, can appear in various colors depending on the staining method used. For example, when subjected to the Gram stain, Gram-positive cocci typically appear purple due to the thick peptidoglycan layer in their cell walls, while Gram-negative cocci appear pink. In other contexts, such as with specific dyes or under a microscope, their color can vary. Overall, the color of cocci is not fixed and depends on the conditions and methods used for observation.
You preformed a gram stain on a sample from a pure culture of bacteria and observed a field of red and purple cocci adjacent cells were not always the same color what do you conclude?
This is a Gram Stain. If the technique was proper, the red rods are Gram-negative and the purple cocci are Gram-positive. This staining technique is used to help identify various bacteria. The Gram-positive bacteria that are purple hold the stain due to it's layered cell membrane. It contains a peptidoglycan layer that acts as a lattice trapping the crystal violet-Iodine dye complex.
What is the difference between gram-positive cocci and gram-negative rods?
Gram-positive cocci are bacteria with a spherical shape that retain a purple stain in the Gram staining method, indicating a thick peptidoglycan cell wall. Gram-negative rods are bacteria with a rod shape that appear pink after Gram staining due to their thinner peptidoglycan cell wall and an outer membrane containing lipopolysaccharides. Additionally, gram-negative rods generally have higher resistance to antibiotics compared to gram-positive cocci.
Why do all cells stain purple in the flagella stain but not in the gram stain?
In the flagella stain, all cells appear purple due to the basic dyes used to stain the flagella. This uniform coloration helps visualize the flagella structure under the microscope. In contrast, the Gram stain uses a series of dyes to differentiate between Gram-positive (purple) and Gram-negative (pink) cells based on their cell wall composition.
A red gram stains means?
Gram positive: dark purple Gram negative: light pink You may need to do your gram stain over again. It should be either dark purple or light pink.
Suppose you are viewing a Gram stained field of red rods and purple cocci through the microscope What do you conclude?
The rods will be gram negative, the cocci are gram positive: most likely, the slide was made from a mixed culture of bacteria, or the culture was contaminated.
What color is coccus under a microscope?
All bacteria, including cocci, are colorless under the microscope unless you use a light filter or a stain. If you use a light filter or a stain then the color depends on which wavelength the filter is for or which type of stain you are using.
