Question

The salivary amylase shows maximum digestive action at pH ______________.

• A. $3.6$
• B. $6.8$
• C. $7.5$
• D. $8.5$

Answer 1

Answer: (B)

$6.8$

The optimum pH for the enzymatic activity of salivary amylase ranges from 6 to 7. Above and below this range, the reaction rate reduces as enzymes get denaturated. The enzyme salivary amylase is most active at pH 6.8. It is the optimum pH of salivary amylase. Our stomach has high level of acidity which causes the salivary amylase to denature and change its shape. So, the salivary amylase does not function once it enters the stomach.

So, the correct answer is '6.8'6.86.8'