If we take food rich in lime juice, then

Options

A. action of ptylain on strach is enhanced
B. action of ptyalin on starch is reduced
C. action of ptylain on starch is unaffected
D. action of ptyalin on starch stops.

Answer

B

Explanation

Ptyalin (that acts on starch) is most active at a pH of 6.8 and the pH of lime juice is less than 4 (acidic), therefore, when lime juice is taken, the action of ptyalin on starch will be reduced.