Question

If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected?
(a) Proteins breaking down into amino acids
(b) Starch breaking down into sugars
(c) Fats breaking down into fatty acids and glycerol
(d) Absorption of vitamins

NCERT Class X
Science - Exemplar Problems

Chapter_Life Processes

Answer 1

starch breaking into sugar

Answer 2

“Salivary amylase” is lacking in the saliva, “starch breaking down into sugars” event in the ‘mouth cavity’ will be affected.

The human saliva is the juice that secreted in the mouth cavity and make the food chewable. At the same time, it also contains an enzyme that is named as salivary amylase.

This enzyme is mainly involved in the decomposition of starch particles into simple sugar molecules. These starch particles are present in food. Hence in the absence of salivary amylase in the saliva, the decomposition of starch into sugars will be effected.