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Q.

If starch is mixed with human saliva in a test tube at a temperature of 370 C and pH 3.7,

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a

Only 30% of starch is digested into glucose

b

All the starch is digested into maltose

c

Only 30% of starch is digested into maltose

d

Digestion of starch doesn’t occur because the enzyme is inactive at this pH

answer is D.

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Detailed Solution

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.
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