BIOMOLECULES AND ENZYMES

BIOLOGY

ENZYMES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Enzymes are ____ that ____ chemical reactions by ____ the amount of activation energy required to start the reaction.
A
carbohydrates, slow down, lowering
B
proteins, speed up, increasing
C
lipids, speed up, lowering
D
proteins, speed up, lowering
Explanation: 

Detailed explanation-1: -Enzymes (and other catalysts) act by reducing the activation energy, thereby increasing the rate of reaction.

Detailed explanation-2: -Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.

Detailed explanation-3: -Some reactions require a great amount of activation energy, which acts as an energy barrier making it difficult for the reactants to come together and react. Enzymes reduce the energy needed for the reactants to come together, increasing the rate of the chemical reaction.

Detailed explanation-4: -The energy required to start a reaction is called the activation energy. The lower the activation energy, the faster a reaction happens.

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