Catalysts: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
A catalyst is a substance that can speed up chemical reactions by lowering the activation energy needed for a reaction to occur. Biological catalysts are known as [[Enzyme|enzymes]]. | A catalyst is a substance that can speed up chemical reactions by lowering the activation energy needed for a reaction to occur. Biological catalysts are known as [[Enzyme|enzymes]]. | ||
[[Catalase|Catalase]] vastly speeds up the decomposition of powerful and potentially harmful [[Oxidising agent|oxidising agent]] [[Hydrogen peroxide|hydrogen peroxide]] into [[Water|water]] and [[Oxygen|oxygen]]. Oscar Loew was the first person who gave the substance the name [[Catalase|catalase]] in 1900. He also found it was present in many plants and animals. [[Catalase|Catalase]] was first noticed as a substance by a French chemist Louis Jacques Thénard in 1811. He also discovered [[Hydrogen peroxide|hydrogen peroxide]] (H<sub>2</sub>O<sub>2</sub>) as a substance and it breakdowns down by the [[Catalase|catalase]]. <br> | |||
Catalase has tetramer shape which contains four peptide chains each which made up more than 500 amino acids. Each of the chain contains a haem prostatic group at the centre of the structure. Haem prostatic group is responsible for the incredibly high activity of the catalase. The iron atom in the haem group aids the catalase break down the by weakening the bond between the molecules. | [[Catalase|Catalase]] has tetramer shape which contains four peptide chains each which made up more than 500 [[Amino_acids|amino acids]]. Each of the chain contains a [[Haem prostatic group |haem prostatic group]] at the centre of the structure. Haem prostatic group is responsible for the incredibly high activity of the [[Catalase|catalase]]. The [[Iron|iron]] [[Atom|atom]] in the [[Haem group|haem group]] aids the [[Catalase|catalase]] break down the by weakening the bond between the [[Molecules|molecules]]. | ||
<br> | <br> | ||
Revision as of 16:00, 28 November 2010
A catalyst is a substance that can speed up chemical reactions by lowering the activation energy needed for a reaction to occur. Biological catalysts are known as enzymes.
Catalase vastly speeds up the decomposition of powerful and potentially harmful oxidising agent hydrogen peroxide into water and oxygen. Oscar Loew was the first person who gave the substance the name catalase in 1900. He also found it was present in many plants and animals. Catalase was first noticed as a substance by a French chemist Louis Jacques Thénard in 1811. He also discovered hydrogen peroxide (H2O2) as a substance and it breakdowns down by the catalase.
Catalase has tetramer shape which contains four peptide chains each which made up more than 500 amino acids. Each of the chain contains a haem prostatic group at the centre of the structure. Haem prostatic group is responsible for the incredibly high activity of the catalase. The iron atom in the haem group aids the catalase break down the by weakening the bond between the molecules.