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Explain the Gram Staining technique?
Gram staining is a differential staining procedure which divides bacteria into two groups: Gram positive and Gram negative, based on staining properties. The gram stain was developed in 1884 by the Danish Physician, Dr. Christian Gram. It is one of the most important and widely employed staining procedure in bacteriology.
It is very useful and is almost essential in identifying an unknown bacteria. The basis of gram staining is the difference in cell wall composition of two types of bacterial cells. Gram positives have thick cell wall, made up of multi-layered peptidoglycan with extensive cross-linking. On the other hand, gram negative cell wall has a very thin peptidoglycan layer surrounded by outer lipid rich outer membrane. There is no outer membrane in case of gram positives. This difference in cell wall leads to decolourization of gram negatives but not gram positives by decolourizing agent i.e., ethanol or acetone.
Explain about Urinary system Urinary system provides us with the service of disposing the waste products carried by blood. This function is also known as excretion.
what is relationship between numbers CPH in photon and frequency of photon? Answer; the photon contains n CPH and its energy is E=hν, when photons energy increases that the num
Classic Procedure: The approach is the same as described earlier for open mitral valvotomy. The excision starts with an anterior incision on the anterior leaflet at 12o'clock p
Q. Why is there a sense of pressure change inside the ear when someone goes down a mountain? The pressure inside the middle ear is maintained equal to the external ear so to th
What are the warning signs of implant failure The warning signs of implant failure are: i). Connecting screw loosening. ii). Connecting screw failure. iii). Gingival b
Q. Does pH affect the enzyme activity? The concentrations of hydrogen ions in solution affect the enzyme activity. Each enzyme has utmost efficiency under an optimum p H . S
GENERA L MECHANISM OF BLOOD COAGULATION - All researchers agree that blood clotting is a cascade mechanism and involves three essential steps - (a) Formation of prothrombin ac
Q. Do enzymes act better under basic or acid pH? Most enzymes act in pH between 6 and 8, a range that corresponds to the general acidic level of blood and cells. There are enzy
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before stem cuttings are planted the cut end of the stem is often dipped in a hormone powder .what is the point of this?
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