The Role of an Enzyme in an Enzyme-Catalyzed Reaction Is

question 93

Multiple Choice

The role of an enzyme in an enzyme-catalyzed reaction is to:

• A) bind a transition state intermediate, such that it cannot be converted back to substrate.
• B) ensure that all of the substrate is converted to product.
• C) ensure that the product is more stable than the substrate.
• D) increase the rate at which substrate is converted into product.
• E) make the free-energy change for the reaction more favorable.

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Definitions:

Glycolysis

The metabolic pathway that converts glucose into pyruvate, generating ATP and NADH without the need for oxygen.

NADH

A coenzyme found in all living cells that is produced during glycolysis and used as an electron carrier in the process of cellular respiration.

FADH2

A redox cofactor involved in cellular respiration, acting as a carrier of electrons to the electron transport chain.

Alcoholic Fermentation

A biological process by which sugars such as glucose, fructose, and sucrose are converted by yeast or bacteria into cellular energy, producing ethanol and carbon dioxide as side products.