Medical Quiz
Biology Quiz

In a water molecule, the ___ end is negative.

A. oxygen

B. hydrogen

C. carbon

D. nitrogen

Select your answer:
A  B  C  D  E 


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Other quiz: Health

This is a disease wherein the gums become tender, red, swollen, and starts to bleed.

A. Tooth decay

B. Periodontitis

C. Malocclusion

D. Gingivitis