GENERAL KNOWLEDGE

GK

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What does an enzyme do?
A
Adds activation energy to a reaction
B
Raises the amount of activation energy for the reaction
C
Lowers the amount of activation energy needed for a reaction
D
Does not affect the metabolism of living things
Explanation: 

Detailed explanation-1: -Enzymes generally lower activation energy by reducing the energy needed for reactants to come together and react. For example: Enzymes bring reactants together so they don’t have to expend energy moving about until they collide at random.

Detailed explanation-2: -Enzymes perform the critical task of lowering a reaction’s activation energy-that is, the amount of energy that must be put in for the reaction to begin. Enzymes work by binding to reactant molecules and holding them in such a way that the chemical bond-breaking and bond-forming processes take place more readily.

Detailed explanation-3: -Enzymes allow activation energies to be lowered. Enzymes lower the activation energy necessary to transform a reactant into a product.

Detailed explanation-4: -Desolvation or taking reactants out of the solution state. Establishing weak bonds between the reactants and enzyme. Bringing the reactant molecules closer in the region of the active sites of enzymes. Development of strain in the bonds of the reactants by the electrophilic and nucleophilic attack.

Detailed explanation-5: -Enzymes lower the energy of activation by forming an enzyme-substrate complex allowing products of the enzyme reaction to be formed and released. Enzyme catalysed reactions occur at a particular place on the surface of the large enzyme molecule called the active site (as in heterogeneous catalysts).

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