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Multiple Choice
Why do chemical reactions in the body require enzymes?
A
Because enzymes provide energy to drive endergonic reactions.
B
Because enzymes lower the activation energy required for reactions to proceed at physiological conditions.
C
Because enzymes are consumed during the reaction and must be constantly replaced.
D
Because enzymes permanently alter the equilibrium position of chemical reactions.
Verified step by step guidance
1
Understand the role of enzymes in biochemical reactions: Enzymes are biological catalysts that speed up chemical reactions without being consumed in the process.
Learn about activation energy: Chemical reactions require a certain amount of energy, called activation energy, to proceed. Enzymes lower this activation energy, making reactions occur more easily under physiological conditions.
Clarify the concept of equilibrium: Enzymes do not permanently alter the equilibrium position of a reaction. Instead, they help the reaction reach equilibrium faster by facilitating the forward and reverse reactions equally.
Address the misconception about energy provision: Enzymes do not provide energy to drive endergonic reactions. Instead, they couple endergonic reactions with exergonic ones, allowing the overall process to proceed.
Understand enzyme consumption: Enzymes are not consumed during the reaction. They remain unchanged and can be reused for multiple reaction cycles.