Knowing the structure of DNA, scientists speculated and then proved that DNA is the template for copying the genetic code. See how information in DNA is copied to make new DNA molecules. TRANSCRIPT: During DNA replication, both strands of the double helix act as templates for the formation of new DNA molecules. Copying occurs at [...]

Atrial fibrillation (AF or A-fib) is the most common cardiac arrhythmia (abnormal heart rhythm)  and involves the two upper chambers (atria) of the heart. Its name comes from the fibrillating (i.e., quivering) of the heart muscles of the atria, instead of a coordinated contraction. It can often be identified by taking a pulse and observing [...]

Calcium-EDTA titration

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