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Is the gram of influenza negative or positive?
(sign) Glucose is a carbohydrate (or sugar). Gram positive or negative refers to a bacterial cell wall and whether or not they take up certain stains. Glucose will be neither since glucose is a molecule and not a bacterial cell.
Does penicillin kill gram negative or gram positive or both?
gram positive because they prevent the synthesis of a structure called peptidogylcan found on the bacterium cell wall
What structure of a bacterial cell determines which kind of biological stain it will take up?
The cell wall of gram-negative bacteria is a thin layer sandwiched between an outer cell envelope and an inner cell membrane. The gram-positive cell wall is much thicker, has no cell envelope, and contains additional substances that retain the blue stain.
Is proteus hauseri gram positive or gram negative?
A Gram negative pathogen. This means it has two thinner petidoglycan cell walls.
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.
Why do bacterial cell walls carry a negative charge?
The Gram positive bacterial cell wall is made up of thick peptidoglycan layer which is rich in Teichoic acids. These teichoic acids are negatively charged because of presence of phosphate in their structure. The Gram negative bacteria have an outer membrane composed of phospholipids and Lipopolysaccharides. The lipopolysaccharides impart a strongly negative charge to surface of Gram negative bacterial cells.
Is the gram of influenza negative or positive?
(sign) Glucose is a carbohydrate (or sugar). Gram positive or negative refers to a bacterial cell wall and whether or not they take up certain stains. Glucose will be neither since glucose is a molecule and not a bacterial cell.
Is mycolic acid found in gram positive and gram negative cell wall composition?
mycobacterium
Do prokaryotic cell walls contain peptidoglycan?
prokaryotes are bacterial cells. Bacterial cells can be either gram positive or gram negative. If the cell wall is gram positive it will have a cell membrane covered by MULTIPLE layers of peptidoglycan with strings of techolic acid going thru it. If the cell wall is gram negative it will have a cell membrane covered by ONE layer of peptidoglycan and an outer membrane surrounding it.
Does vancomycin treat gram negative bacterial infections?
Vancomycin is used to treat both Gram positive and Gram negative coccal infections. The drug inhibits the synthesis of peptigoglycan, a vital component of the cell wall of both Gram positive and Gram negative cocci. Although Gram negative cocci have an additional outer membrane that "vanco" can't penetrate, it can crack the outer membrane, ultimately allowing the drug to act on the cell.
What are the typical coliform found in water?
Coliforms represent normal bacterial flora found in the intestines of humans and animals.Examples of coliform found in water include:Enterotoxigenic E. coli (Gram negative bacterium) which causes traveler's diarrheaShigella spp. (Gram negative bacterium) which causes bacillary dysenteryVibrio cholerae (Gram negative bacterium) which causes choleraSalmonella enterica typhi (Gram negative bacterium) which causes typhoid fever
Is Neisseria meningitidis Gram-positive cocci?
Neisseria gonorrhoeae ( nīsə′rēə ′gänə′rē′ī ) ( microbiology ) A gram-negativecoccus pathogen that causes the sexually transmitted disease gonorrhea
Why is important to distinguish between Gram-positive and Gram-negative bacteria in diagnosing a bacterial infection?
gram- negative and gram- positive bacteria differ in their response to different antibiotics
How do protoplast differ from L form?
Protoplasts are formed from gram-positive cells in the presence of lysozyme, which destroys the cell wall. L forms are gram-positive or gram-negative bacteria that do not make a cell wall. Therefore, L forms never had or made a cell wall as opposed to protoplasts which used to have a cell wall, but no longer do because it was destroyed. Penicillin can be used to destroy the cell wall of a bacterial gram-positive cell and form a protoplast, but in the presence of Penicillin, if a new bacterial cell is forming and cannot create a cell wall, then it will become an L form.
What part of bacterial cell is most involve with gram staining and why?
In the gram staining process, gram positive bacteria appear to be purple because their cell walls, which contain a large concentration of peptidoglycans, are strongly dyed. Gram negative bacteria appear pink because their walls asborb less dye. This occurs becayse there is a smaller concentration of peptidoglycans and an additional lipid layer surrounds the cell wall. ANSWER The exact mechanism of action of this staining technique is not clearly understood. However, it is known that differences in the biochemical composition of bacterial cell walls parallel differences in their Gram-stain reactions. Gram-positive bacterial walls are rich in tightly linked peptidoglycans (protein-sugar complexes) that enable cells to resist decolorization. Gram-negative bacterial walls have a high concentration of lipids (fats) that dissolve in the decolorizer (alcohol, acetone, or a mixture of these) and are washed away with the crystal violet. The decolorizer thus prepares gram-negative organisms for the counterstain.
Does penicillin kill gram negative or gram positive or both?
gram positive because they prevent the synthesis of a structure called peptidogylcan found on the bacterium cell wall
What is the action of antibiotics used to treat Gram negative bacterial infections?
Most work by inhibiting cell wall biosynthesis in the bacteria.
