What is the main role of bacteria in tooth decay?
Answer and explanation
Correct answer: They produce acids from sugar
The governing concept is pH-dependent demineralisation. Bacteria in dental plaque metabolise sugars left in the mouth and release organic acids. These acids lower the local pH; when it becomes sufficiently low, minerals in enamel dissolve more readily, beginning tooth decay. Option A is correct. Bacteria do not turn teeth or saliva into metals, nor do they fill teeth with chlorine.
Frequently asked questions
What is the correct answer to this question?
They produce acids from sugar
Why is this the correct answer?
The governing concept is pH-dependent demineralisation. Bacteria in dental plaque metabolise sugars left in the mouth and release organic acids. These acids lower the local pH; when it becomes sufficiently low, minerals in enamel dissolve more readily, beginning tooth decay. Option A is correct. Bacteria do not turn teeth or saliva into metals, nor do they fill teeth with chlorine.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
