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The graph above shows the progress of a chemical reaction. Based on the graph, which of the following is true?

Reaction A is enzyme-catalyzed, while reaction B is not enzyme-catalyzed.
Reaction A is not enzyme-catalyzed, while reaction B is enzyme-catalyzed.
Reaction A uses cofactors, while reaction B does not use cofactors.
Reaction A and reaction B use cofactors.

The graph above shows the progress of a chemical reaction Based on the graph which of the following is true Reaction A is enzymecatalyzed while reaction B is no class=

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In the given graph, it can be seen that the energy consumed by Reaction B is much lower compared to Reaction A during which both of the reaction reached the peak. This now suggest that because the reaction energy required for B is lowered, then the answer to this item is the second option. 

Answer: Reaction A is not enzyme-catalyzed, while reaction B is enzyme-catalyzed

Explanation:

The minimum energy required by the reactants to cross the energy barrier is called as activation energy. The use of enzyme lowers the activation energy as it takes the reaction through a different pathway which is lower in energy. Thus a enzyme catalyzed reaction has low activation energy as compared to a non catalyzed reaction.

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