Topics: Virus Quiz
What’s more important for preventing infection?
A. Wearing a face mask
B. Frequent hand washing
Select your answer:

Topics:
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Biotechnology › ViewWhy do the fragments of DNA in gel electrophoresis travel away from the negative electrode?
A. DNA is negatively charged so attracted to the positive end of the unit
B. DNA is positively charged to attracted to the negative end of the unit
C. the agarose gel in negatively charged
D. the agarose gel is positively charged
Basics of Cardiology › View
Which heart valve is located between the left atrium and left ventricle?
A. Pulmonary valve
B. Tricuspid valve
C. Bicuspid (mitral) valve
D. Aortic valve