cell wall of gram bacteria and gram bacteria

In 1884 a Danish physician Christian Gram devised a technique of differential staining for bacterial cells, using two simple stains. The procedure involves staining bacteria initially with a weak alkaline solution of gentian (crystalline) violet. All bacterial cel..

It is the most common mode of asexual reproduction. The cytoplasm and nucleoid of a bacterial cell divide equally into two, following replication of DNA. The cell wall and cytoplasm also split resulting in the formation of two daughter cells..

One of the unsolved mysteries in biology is that of viruses. Due to the absence of a cellular organization viruses cannot be placed with either prokaryotes or eukaryotes. They are considered as intermediate between living and non-living systems. Viruses are active and show reproduction only inside ..

A cell wall is a characteristic feature of plant cells, bacteria and fungi. The composition however varies in different grou..

The cellwall of prokaryotes like bacteria is composed of peptidoglycans. Apart from maintaining the shape and size of plant cells, the cell wall is involved in some specific functions such as Protection against the attack of pathogens Providing mechanical sup..

The equation w = e t 3 + 3 e t + 4 represents the change in mass ' w ' (in grams) of a bacteria culture as time ' t ' (in hours) changes. Find the least mass of the culture. => 2 grams or 6 grams or 4 grams or 3 grams..

These are invaginations formed by the plasma membrane. They are spherical or elongated structures which bring about a functional compartmentalisation of the cell. They have significant roles in cell division and replication. They are more common in Gram positive ..

Earlier E. coli was used as a host for the recombinant DNA. Now Bacillus subtilis and yeast are also being used. The bacteria to be used as hosts should be without plasmids. Their wall is made permeable by treatment with calcium chloride or lysozyme. The recombinant DNA is added..

These are a group of filamentous bacteria having a plant body resembling the fungal mycelia. They grow in the form of radiating colonies. They grow abundantly in water and soil rich in decaying organic matter. They are gram positive bacteria which constitute a major co..

A lose gelatinous sheath called slime layer is usually deposited around the bacterial cell wall. It is usually composed of polysaccharides. In some bacteria, the slime layer becomes thick due to the presence of some nitrogen compounds and forms a capsule. A capsule is ..