Which statement best describes the effect of denaturation on enzyme activity?

Which statement best describes the effect of denaturation on enzyme activity?

• A. Increased activity
• B. No effect
• C. Loss of activity
• D. Unfolding of protein

Answer: (C)

Denaturation disrupts the three-dimensional shape of an enzyme, which is essential for forming a functional active site. When the protein unfolds or its folds are altered, substrates can no longer bind properly or the catalytic residues can’t facilitate the reaction. That structural loss directly reduces or eliminates enzymatic activity. Denaturation often involves unfolding, but the key outcome here is the loss of function. Increased activity isn’t possible without a properly formed active site, and no effect would ignore how sensitive enzyme function is to shape changes.

Denaturation disrupts the three-dimensional shape of an enzyme, which is essential for forming a functional active site. When the protein unfolds or its folds are altered, substrates can no longer bind properly or the catalytic residues can’t facilitate the reaction. That structural loss directly reduces or eliminates enzymatic activity. Denaturation often involves unfolding, but the key outcome here is the loss of function. Increased activity isn’t possible without a properly formed active site, and no effect would ignore how sensitive enzyme function is to shape changes.