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Who is the secretary of gram panchayat?
Gram sevak
What is the definition of gram?
1 gram is the weight of 1 cubic centimeter of pure water. 1 gram is one thousandth = 0.001 of a kilogram.
What does the suffix -gram mean?
The suffix gram means to draw or write. This is used in telegram.
What is the abbreviation for grams?
The abbreviation for gram is gm. and the symbol is g. Gram is short g.
What does the greek prefix gram mean?
The prefix gram means to write or draw. An example is gramophone.
What three types of data are obtained from the gram stain?
The three types of data obtained from a Gram stain are cell morphology (shape and size of the cells), cell arrangement (how cells are grouped together), and Gram reaction (whether cells are Gram-positive or Gram-negative based on their cell wall composition).
What are cheek cells gram positive or gram negative?
Cheek cells do not have a cell wall, therefore they are neither gram positive nor gram negative. Gram staining is a technique used to differentiate bacteria based on the composition of their cell wall, which animal cells like cheek cells do not possess.
Can you gram stain a cell without a cell wall?
No, Gram staining primarily distinguishes bacteria based on their cell wall composition (Gram-positive vs Gram-negative). Cells without a cell wall, such as animal cells, cannot be Gram stained due to the absence of the target structure for the stain to bind to.
Are human cells gram positive?
Human cells are Gram-negative because they do not contain certain structures. More simply, if they don't have a cell wall they cannot be Gram-positive.
Construct a Venn diagram to illustrate the similarities and differences between gram positive gram negative cells?
Not really possible to make a venn diagram, but here's a list: Similarities: In Bacteria Involve a peptidoglycan layer Differences Gram-negative is much more toxic Gram-negative is crystal violet in the Gram stain while Gram-positive is red
Can prokaryotic cells be either gram positive or gram negative?
Yes, prokaryotic cells can be either gram positive or gram negative. This is determined by the structure of their cell walls and how they react to the Gram staining technique. Gram-positive bacteria have a thick layer of peptidoglycan in their cell walls, while gram-negative bacteria have a thinner peptidoglycan layer surrounded by an outer membrane.
If your organisms were all blue with pink spots what is the Gram reaction if your organisms were all pink but had some blue spots what is the Gram reaction?
Gram positive cells take up the crystal violet, which is then fixed in the cell with the iodine mordant. This forms a crystal-violet iodine complex which remains in the cell even after decolorizing. It is thought that this happens because the cell walls of gram positive organisms include a thick layer of protein-sugar complexes called peptidoglycans. This layer makes up 60-90% of the gram positive cell wall. Decolorizing the cell causes this thick cell wall to dehydrate and shrink, which closes the pores in the cell wall and prevents the stain from exiting the cell. At the end of the gram staining procedure, gram positive cells will be stained a purplish-blue color. Gram negative cells also take up crystal violet, and the iodine forms a crystal violet-iodine complex in the cells as it did in the gram positive cells. However, the cell walls of gram negative organisms do not retain this complex when decolorized. Peptidoglycans are present in the cell walls of gram negative organisms, but they only comprise 10-20% of the cell wall. Gram negative cells also have an outer layer which gram positive organisms do not have; this layer is made up of lipids, polysaccharides, and proteins. Exposing gram negative cells to the decolorizer dissolves the lipids in the cell walls, which allows the crystal violet-iodine complex to leach out of the cells. This allows the cells to subsequently be stained with safranin. At the end of the gram staining procedure, gram negative cells will be stained a reddish-pink color. Remember:
Are yeast cells gram positive or gram negative?
Yeast cells are usually classified as gram-positive because they have a thick cell wall composed of chitin and beta-glucans, similar to other fungi. However, yeast cells may not always adhere strictly to the gram staining classification due to variations in cell wall composition.
What is the result of gram stain on human cell?
Human cells have no cell walls, only a plasma membrane, and as a result lack the peptidoglycan layer that gram stains utilize to differentiate between gram negative and gram positive species of bacteria. Therefore, human cells are unable to retain the crystal violet introduced in the first step of the gram stain, and stain negative. (they appear pinkish like gram-negative bacteria)
Why is gram staining not usually applied to eucaryotes?
Gram staining is commonly used on prokaryotic bacteria to determine if their cell wall is gram negative or gram positive. Their cell wall is made of peptidoglycan. It responds well and is stained in certain ways depending on the structure (wether it's gram positive or negative). Animal eukaryotic cells don't even have a cell wall to be stained. In the case of eukaryotic plant cells, that do have cell walls, their cell wall is not made of peptidoglycan. In any case, there is no such thing as gram positive, or gram negative, cell walls in eukaryotes. There would be no point in the test, since it's specifically designed for prokaryotic cells.
Are eukayotic cells from you gumline gram-positive or gram-negative?
Eukaryotic cells, such as those found in the gumline, do not fall under the categories of gram-positive or gram-negative bacteria. The gram staining technique is used to determine the cell wall structure of bacteria, not eukaryotic cells. Eukaryotic cells have a different cellular structure, including a nucleus and membrane-bound organelles.
What is the current theory about the mechanism of the gram stain?
The gram stain is a basic differential stain used to determine if a bacterial cell is gram positive or negative. Gram positive cells have a thick peptidoglycan layer that will trap the crystal violet iodine crystalls and apear purple. Gram negative cells only have a thin peptidoglycan layer that allows the crystals to diffuse out of the cell and will only be seen with the application of a counterstain, such as safranin which turns the cells pink.
