difference between gram positive bacteria and gram negative 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 cells stain blue w..

show a primitive type of sexual reproduction called genetic recombination. In this process, the exchange of genetic materials takes place by a process called conjugation . Conjugating bacterial cells are in contact through a hollow tube called pilus. In the higher organisms, sexual reproduct..

Bacteria exhibit different modes of nutrition. On this basis, broadly two types of bacteria can be recognised autotrophic bacteria and heterotrophic bacteria..

The photoautotrophic bacteria possess photosynthetic pigments in membrane bound lamellae (or thylakoids) and utilise solar energy. The bacterial photosynthesis is different from that of green plants since here water is not used as a hydrogen donor. Hence oxygen is not release..

Relationship between Gram Molecular Weight and Gram Molecular Volume - Gram molecular weight (GMW) is the relative molecular mass of a substance expressed in grams. It is also called gram molecule of that element. Gram molecular volume (GM..

Gram molecular weight (GMW) is the relative molecular mass of a substance expressed in grams. It is also called gram molecule of that element. Gram molecular volume (GMV) or molar volume, is the volume occupied by one gram molecular weight of a gas ..

The price of silver per 10 grams has gone up to 135% of its price in four years time. Find the difference in the price if silver costs $125 per 10 grams initially. => $45.25 or $43.75 or $25.5 or $42.75..

Find the orders of magnitude that a horse weighing 400 kg differs from a mouse weighing 40 grams. => 1 or 4 or 10000 or 10..

Division: Angiospermae Class: Dicotyledonae Sub Class: Polypetalae Series: Calyciflorae Order: Rosales Family: Fabaceae (=Leguminosae) Leguminosae is one of the largest families in dicots, including about 690 genera and nearly 18,000 species. In all the major systems of classification, the family L..

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..