Why they are called volutin granules?
Volutin granules, sometimes termed metachromatic granules because of their colour reaction with the dyes used in light microscopy, contain polymerized inorganic phosphate, an energy-rich compound that acts as a reserve store of energy and of phosphate.
Where are volutin granules found?
Polyphosphate granules display the metachromatic effect, appearing red when stained with methylene blue. Volutin granules can also be found in the cytoplasm of Saccharomyces, a genus of ascomycete fungi. They are characteristic for different species and depend on the age and condition of the culture.
Which organisms contain volutin granules?
Volutin granules are commonly found in bacteria. Nevertheless, a few species of algae, protozoa, and fungi were reported to contain the same granules. Synonym(s):
What is the function of metachromatic granules?
function in bacteria Volutin, or metachromatic granules, contains polymerized phosphate and represents a storage form for inorganic phosphate and energy. Many bacteria possess lipid droplets that contain polymeric esters of poly-β-hydroxybutyric acid or related compounds.
What is volutin composed of?
The volutin granule was isolated from yeast by disruption of freeze-dried cells in an organic solvent and density-gradient-gradient centrifugation. The granule is composed of two types of macromolecule, a linear-chain polyphosphate and four basic proteins, of molecular weights ranging from 10 000 to 20 000.
What is meant by Metachromasia?
Metachromasia describes the phenomenon in which certain tissue constituents reacting with a single dye show different colors from that of the dye solution.
What is metachromatic effect?
From Wikipedia, the free encyclopedia. Metachromasia (var. metachromasy) is a characteristical change in the color of staining carried out in biological tissues, exhibited by certain dyes when they bind to particular substances present in these tissues, called chromotropes.
What is the meaning of metachromatic?
Definition of metachromatic 1 : staining or characterized by staining in a different color or shade from what is typical metachromatic granules in a bacterium. 2 : having the capacity to stain different elements of a cell or tissue in different colors or shades metachromatic stains.
What is Metachromasia histology?
metachromasy) is a characteristical change in the color of staining carried out in biological tissues, exhibited by certain dyes when they bind to particular substances present in these tissues, called chromotropes. …
Why do mast cells show Metachromasia?
The presence of cytoplasmic granules characterizes mast cells. Owing to the high acidity of the heparin in these granules, alkaline dyes undergo a change in color. This property, known as metachromasia, is unique to mast cells and basophils. The alkaline dye toluidine blue will stain secretory granules red-violet.
What is metachromatic?
What is Volutin composed of?
What is the evolution of Transportation?
The evolution of transportation, just like the evolution of humankind, has gone through trials and tribulations as it has evolved through time. It has ebbed and flowed, overcoming challenges to grow to ever-increasing levels of complexity and efficiency.
What are the various means of transport in the past?
Various animals like horse, mules, donkeys, elephants, and reindeer were used as means of transport in the past. But as the time paced and the wheel came into existence, we humans started using carts driven by these animals thus making long distance journeys easier and faster. Here we shall see the evolution stories of various means of transport!
What was the first means of Transportation on land?
The first means of transportation on land were certainly rudimentary slides, obtained from the trunks of trees, to carry heavy loads. But the most important invention in the history of road transport was the wheel.
What is the most popular means of transport in the world?
9. Cars are the most popular means of transport in the world. The greatest advancements in cars were made by Henry Ford. Cars are powered by liquid fuel-either gasoline or diesel. Cars are also very popular in motor sports like f-1 and f-2.