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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.
What are the excretory organs in protozoa.
Pulmonary Stenosis : The obstruction may be valvar, infundibular or supra valvar.
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in what aspect are the cnidarians similar to the protozoans?
what happen to a denatured enzyme regarding its functionality? how can that result be explained with the help of the lock and key model?
What is a characteristic feature of a carrier protein in a plasma membrane? Carrier proteins are globular proteins which are particular it their action and therefore regulate t
In tomatoes, two alleles of one locus determine the character difference of purple versus green stems (alleles are P and p with P being completely dominatn and coding for purple st
Significance of Mitosis 1. Reproduction ; William Bateson 1906 wrote, Whenever I observe a dividing cell under the microscope , I feel as if the original act of c
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