Question

The bacteria present on uncleaned teeth convert the sugar in food into a substance X which causes tooth decay. Name the substance X . Which part of the teeth does it affect?

Answer 1

the bacteria convert food(glucose) into lactic acid which affects dentin or enamel of the teeth

Answer 2

There are several kinds of bacteria present in an unhygienic teeth.
The bacteria converts the sugar in food leftover in the teeth to lactic acid.
The formation of the acid decays the enamel of the teeth.