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β 14y agoGram positive cells withold the crystal violet stain whilst gram negative cells are unable to and thus when washed with ethanol the stain washes out. This enables them to be free to take up the counterstain safranin.
http://en.wikipedia.org/wiki/Gram-negative_bacteria
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β 14y agoGram positive bacteria have a thick layer of peptidoglycan in their cell wall, while gram negative bacteria have a thin layer of peptidoglycan surrounded by an outer membrane. This structural difference affects how bacteria retain or release the crystal violet stain during the Gram staining process. Gram positive bacteria retain the stain due to the thick peptidoglycan layer, while gram negative bacteria lose the stain due to the outer membrane acting as a barrier.
Gram staining is a general type of stain used to separate types of bacteria based on their cellular structures. This technique classifies bacteria into Gram-positive (purple) and Gram-negative (pink) based on differences in their cell wall composition.
Heat-resistant structures in bacteria include endospores, which are dormant, tough structures that can survive extreme conditions like high temperatures. Endospores are formed by some bacteria as a defense mechanism to protect their genetic material. They allow bacteria to withstand harsh environments and continue to exist in unfavorable conditions.
The two structures that produce chemicals that can kill bacteria are lysosomes and peroxisomes. Lysosomes contain enzymes that can break down bacterial cell walls, while peroxisomes produce hydrogen peroxide, which has antimicrobial properties.
Endoflagella are specialized structures found in certain bacteria, such as spirochetes. These flagella are located at the ends of the cell and wrap around the cell body, allowing for a corkscrew-like movement. Endoflagella contribute to the unique motility and shape of spirochete bacteria.
Tea tree oil - contains antimicrobial properties that can help kill bacteria. Honey - has antibacterial properties that can help inhibit bacterial growth. Garlic - contains allicin, a compound with antibacterial properties. Apple cider vinegar - has antimicrobial properties that can help kill bacteria.
Gram staining is a general type of stain used to separate types of bacteria based on their cellular structures. This technique classifies bacteria into Gram-positive (purple) and Gram-negative (pink) based on differences in their cell wall composition.
Mannitol salt agar is selective because the high salt concentration inhibits the growth of most bacteria except salt-tolerant Staphylococci species. It is differential because it contains mannitol and a pH indicator that changes color if mannitol is fermented. EMB agar is selective because it inhibits the growth of Gram-positive bacteria, and it is differential because it contains lactose and eosin/methylene blue dyes that differentiate between lactose fermenters and non-fermenters based on color change.
differential staining is a staining technique used to stain colorless bacteria against a dark background.
Differential staining is the procedure that are used to distinguish organism based on their staining properties. Use of gram stain divide bacteria into two classes - gram positive which retain crystal violet stain purple colour, gram negative which lose their crystal violet and give pink colour. By this method we can differentiate two different types of bacteria having different cell wall composition that is the reason gram staining used widely as differential staining
Differential staining is the procedure that are used to distinguish organism based on their staining properties. Use of gram stain divide bacteria into two classes - gram positive which retain crystal violet stain purple colour, gram negative which lose their crystal violet and give pink colour. By this method we can differentiate two different types of bacteria having different cell wall composition that is the reason gram staining used widely as differential staining
Bacteria are typically too small to be observed in detail using a light microscope due to their size being below the resolving power of the microscope. The structures within bacterial cells are also very small and can require more advanced imaging techniques, such as electron microscopy, for accurate observation.
what is nitrogen fixing bacteria live in these structures found in the roots of legumes
Heat-resistant structures in bacteria include endospores, which are dormant, tough structures that can survive extreme conditions like high temperatures. Endospores are formed by some bacteria as a defense mechanism to protect their genetic material. They allow bacteria to withstand harsh environments and continue to exist in unfavorable conditions.
Endoflagella are specialized structures found in certain bacteria, such as spirochetes. These flagella are located at the ends of the cell and wrap around the cell body, allowing for a corkscrew-like movement. Endoflagella contribute to the unique motility and shape of spirochete bacteria.
The smallest structures visible with a light microscope are typically around 200 nanometers in size. This includes some organelles like mitochondria and small bacteria. Anything smaller would require an electron microscope for visualization.
The five major structures found in bacteria are capsule,ribosome,nucloid,flagella pilli,cytoplasm and pilus also
Particles that can be found in a liquid can include molecules of the liquid itself, dissolved solute particles, and sometimes suspended particles such as dust or bacteria. These particles contribute to the properties and behavior of the liquid.