Multiple choice

If we take food rich in lime juice, then

  1. action of ptyalin on starch in enhanced

  2. action of ptyalin on starch is reduced

  3. action of ptyalin on starch is unaffected

  4. action of ptyalin on starch stops
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ptyalin (salivary amylase) functions optimally in a slightly alkaline or neutral pH. Lime juice is acidic; therefore, it lowers the pH of the mouth, which inhibits or reduces the action of ptyalin on starch.

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