Concept:Enzymes are proteinaceous catalysts that rely on a specific 3D folded structure. High temperatures impart excess kinetic energy, breaking the weak non-covalent bonds holding this structure together.
Formula:$$N/A$$
Solution:- As temperature increases up to 50°C, enzyme activity typically increases (reaching an optimum).
- However, pushing temperatures above this optimum range (typically above 50°C - 60°C for human enzymes) violently disrupts hydrogen bonds and hydrophobic interactions.
- This leads to thermal denaturation, unfolding the active site. Because the protein coagulates and unfolds irreversibly, it loses activity permanently above 50°C.
Why other options are incorrect:Below 37°C, enzyme activity decreases due to low kinetic energy, but it does NOT lose activity permanently (it regains activity when warmed). It definitely does not "work" above 50°C once denatured.
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