Discussion
Which of the following is used to preserve DNA at room temperature?
Answer: A
DNA is preserved at room temperature on an FTA card.
FTA cards (Flinders Technology Associates) are filter papers impregnated with chemicals that lyse cells, denature proteins and protect the released DNA from nucleases, bacteria and ultraviolet damage. Blood or buccal samples spotted on them stay stable for years at room temperature, which makes them convenient for reference samples and databases.
Chelex is a resin used to extract DNA, and DNA IQ is a magnetic-bead extraction system; neither is a storage medium. Plain Whatman paper can hold a dried stain but lacks the chemicals that protect the DNA.
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