Question

how.is.the.activity.of.enzyme.affected.by.ph.and.temperature

Answer 1

A temperature is higher than 60 degree they are completely denatured.Thus PH & temperature affect the enzyme activity

Answer 2

Increasing further temperature damages the active sites and changes their shapes. Substrates can no longer fit into the active sites . At temperature higher than 60 degree Celsius enzymes are basically completely denatured . Thus pH and temperature are affect the enzyme activity to a great extent.