What does an enzyme act on directly?

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Study for the 9th Grade Biology SOL Test. Prepare with flashcards and multiple choice questions, each featuring hints and explanations. Get ready for your exam!

Multiple Choice

What does an enzyme act on directly?

Explanation:
Enzymes act directly on substrates. They bind at the active site to form an enzyme–substrate complex, which holds the substrate in the right position and orientation so bonds can be rearranged to form products. The enzyme isn’t acting on the products or on inhibitors in the catalytic step, and activation energy is the energy barrier the enzyme lowers to make the reaction proceed faster. So the molecule being transformed by the enzyme is the substrate.

Enzymes act directly on substrates. They bind at the active site to form an enzyme–substrate complex, which holds the substrate in the right position and orientation so bonds can be rearranged to form products. The enzyme isn’t acting on the products or on inhibitors in the catalytic step, and activation energy is the energy barrier the enzyme lowers to make the reaction proceed faster. So the molecule being transformed by the enzyme is the substrate.

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