Question

Ptyalin, an enzyme work in saliva, which is

• A. Alkaline medium
• B. Almost neutral medium
• C. Acidic medium
• D. None of the above

Answer 1

The correct option is B Almost neutral medium

The stomach is highly acidic and these conditions are very unfavorable for ptyalin, which prefers a pH of about 6.9 for activity. Ptyalin is a protein found in saliva, that breaks down the insoluble starch found in foods into smaller, soluble sugar fragments. This is another name for the amylase found in saliva, known as salivary amylase. This particular type of amylase is found only in humans.