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Question
The energy required for the start of biochemical reaction is
The energy required for the start of biochemical reaction is
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Solution
The correct option is C Activation energy
All reactions, whether exergonic or endergonic, have an energy barrier known as the energy of activation (E A), or activation energy, which is the energy required to break the existing bonds and begin the reaction. In a population of molecules of any kind, some have a relatively high kinetic energy, whereas others have a lower energy content. Only molecules with a relatively high kinetic energy are likely to react to form the product. Even a strongly exergonic reaction, one that releases a substantial quantity of energy as it proceeds, may be prevented from proceeding by the activation energy required to begin the reaction. For example, molecular hydrogen and molecular oxygen can react explosively to form water. This reaction is spontaneous, yet hydrogen and oxygen can be safely mixed as long as all sparks (source of energy) are kept away, because the required activation energy for this particular reaction is relatively high. A tiny spark provides the activation energy that allows a few molecules to react. Their reaction liberates so much heat that the rest react, producing an explosion.
All reactions, whether exergonic or endergonic, have an energy barrier known as the energy of activation (E A), or activation energy, which is the energy required to break the existing bonds and begin the reaction. In a population of molecules of any kind, some have a relatively high kinetic energy, whereas others have a lower energy content. Only molecules with a relatively high kinetic energy are likely to react to form the product. Even a strongly exergonic reaction, one that releases a substantial quantity of energy as it proceeds, may be prevented from proceeding by the activation energy required to begin the reaction. For example, molecular hydrogen and molecular oxygen can react explosively to form water. This reaction is spontaneous, yet hydrogen and oxygen can be safely mixed as long as all sparks (source of energy) are kept away, because the required activation energy for this particular reaction is relatively high. A tiny spark provides the activation energy that allows a few molecules to react. Their reaction liberates so much heat that the rest react, producing an explosion.
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