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The Biological Catalysis Enzyme:
Biological catalysis are called enzyme. An enzyme can be defined as an organic substance that tremendously accelerates a chemical reaction without changing its direction and is neither used up nor permanently altered in the rection so that it can be sued again and again ,Enzyme are dtudied under the branch enzymology .First indication of the occurrence of enzymes in living systems was given by Kirchhoff 1815 who prepared a wheat extract that could catalyze transformation of starch into sugar. There after Louis pastier 1860 discovered that the fermentation of foodstuffs can be brought about by yeast cells .Kuhne 1878 discovered that in fact a ferment present in yeast cell. Brings about this fermentation .He called this ferment an enzyme presumably about 3000 kinds of enzymes are required to catalyze metavolic reaction in an ordinary cell. All ezymes are synthesized within the cell itself under genic control, Scientists have so far identified about 2000 enzymes . They have however ascertained that these enzyme can catalyze reactions even outside the cells . A few hundred enzymes have been extracted in pure form and pure crystals of many of these have been prepared. Buchner1897 was first to prepare a pure extract of zymase enzyme from yeast. The Noble laureate sumner 1926 first prepared pure crystals of urease enzyme from jack beans Northrop 1930 gastric and pancreatic juices .He also postulated that chemically all enzymes are proteins.
Explain the Assessment of Zn Status? Sensitive indices for assessing zinc status are unknown at present. Static indices, such as zinc concentration in plasma, blood cells and h
Q. What is the endosymbiotic hypothesis about the origin of mitochondria? And what are the molecular facts that support the hypothesis? And To which other cellular organelles can t
In lab rats, hair color and texture are controlled by two genes, the A gene for color and the B gene for texture. in both of these genes, the alleles show no dominance to each othe
What are the synthetic auxins and what are their uses? The Synthetic auxins like naphthalenic acid (NAA) and indolebutyric acid (IBA) are substances similar to IAA (a natural a
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What is Brown Algae ? Phaeophyta are commonly known as brown algae; precisely because they are - guess what? - brown in color! They are brown because they contain brown colored
Hydrops allantois (Hydro allantois) This condition is uncommonly seen in dairy cattle and buffaloes. Accumulation of excessive allantoic fluid may be progressive after mid ges
It is a clinical syndrome wherein heart fails to pump blood at a rate required by the tissues of the body or it can do so only with an elevated filling pressure. This may be due to
Kingdom Monera The monerians are structurally the simplest of all living things. They have apparently changed little since they first appeared on the earth. Their structure is
Alkaline slant - Observation for Carbohydrate Utilization Pattern Test Alkaline slant (red) and acid butt (yellow) with or without gas production - This indicates fermentation
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