NCERT Important Questions Class 9 Science biology Chapter 13
Important NCERT Extra Questions
Chapter 13 Why do We Fall ill
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board
What kills bacteria in our food in the mouth and stomach?
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The enzyme lysozyme in saliva kills bacteria in food in our mouth, and in stomach HCI (hydrochloric acid) of gastric juice kills the bacteria.