Question

Optimum temperature and pH for the enzyme are-
A. 20-25 degree Celsius and 7pH
B. 20-35 degree Celsius and 6.5pH
C. 20-35 degree Celsius and 7.5pH
D. All are correct

Answer 1

Hint: Temperature of an enzyme should be optimum to activate it because the temperature below the optimum level makes the enzyme inactive and gets denatured at a higher temperature. The pH of an enzyme should be optimum because any lowering or increase of pH may fluctuate the enzymatic actions.

Complete answer: There is an optimum temperature and pH for an enzyme. When the temperature gets greater than 45 degrees Celsius, the enzyme doesn’t act. A stable temperature leads to proper enzymatic action and indicates the low molecular weight of the enzyme. To a certain period of time, the temperature of the enzyme reaction increases constantly and gets denatured at a temperature higher than the level. Change in pH leads to alteration of an enzyme reaction. A continuous increase in the pH leads to a sharp decrease in the reaction and it stops. The optimum temperature for an enzyme is 20-25 degrees Celsius and the optimum pH is 7 (neutral).
Hence, the correct answer is A.

Note: Some optimum pH of certain enzymes are lipase has optimum pH of 8, lipase has pH of 4, pepsin has pH of 1.5, Invertase has pH of 4.5, maltase has pH of 6.1. Some optimum temperatures of certain enzymes are enzymes in the Archaebacterium have temperatures greater than 95 degree Celsius, pyrococcus have temperatures of 100 degree Celsius.