enzymes as catalysts in living systems

A large number of chemical reactions will be taking place in a cell. The rate and efficiency with which these reactions go on in a cell, depend on a group of macromolecules called enzymes. Enzymes are thus, biological catalysts. Enzymes are synthesised by ..

Enzyme Catalysis - Enzymes are macromolecules, usually proteins, produced in living systems, which act as catalysts in physiological reactions. The striking characteristics of enzymes are their catalytic power and specificity. Enzymes..

Metals in the Living System - Traces of metal is necessary for the human and animal system to function efficiently. Some of the important metals required are iron, copper, zinc, sodium and potassium. Iron metal is a constituent of haemoglobin in blood which carries oxy..

Enzymes and Inorganic Catalysts - Enzymes resemble inorganic catalysts in several aspects and differ from them in many other features. These similarities and differences are summarised in the following table. fig. 14.12 - Similarities and Differences between ..

Enzymes resemble inorganic catalysts in several aspects and differ from them in many other features. There are two different views to explain the mode of enzyme action the lock and key hypothesis and the induced-fit hypothesi..

Enzymes - Enzymes are the biocatalysts of life. They are defined as biocatalysts synthesized by living cells. They are simple or conjugate protein and specific in action. At present about 300 enzymes are recognized and classified into six classes by Internati..

Catalysts are substances, which alter the rate of chemical reactions without undergoing any overall chemical change themselves. In the manufacture of ammonia, iron is used as a catalyst and it enhances the rate of this reaction. as a catalyst. Sometimes cataly..

The present system of classification, recognises the living organisms under five kingdom..

Living Beings are Organised - Organisation refers to a kind of structure or system or situation where the smaller components become arranged into larger ones in a hierarchical order of complexity, to co-ordinate with one another in performing common functions or achieving common..

Summary - Biologists estimate that there are about 30 million species of living organisms inhabiting this biosphere and only a million and half of it have been discovered and described so far. The species of plants and animals identified so far exhibit a great deal of variation in their f..