Which practice helps prevent moisture buildup and preserve DNA during packaging?

Which practice helps prevent moisture buildup and preserve DNA during packaging?

• A. To confuse investigators
• B. To maximize moisture retention
• C. To change the color of the sample
• D. To prevent moisture buildup and preserve DNA

Answer: (D)

Moisture control in packaging is key to preserving DNA. DNA degrades when exposed to humidity because water can drive hydrolysis and support microbial growth that chews up DNA strands. That’s why the best practice is to keep items dry and minimize any moisture exposure during packaging. This means letting damp items dry when possible, using breathable packaging like paper bags for dry evidence rather than plastic that traps moisture, and including desiccants or humidity barriers as needed. Sealing packaging properly to block moisture ingress and storing under appropriate conditions further helps maintain DNA integrity. Other approaches that add or retain moisture or otherwise interfere with evidence handling would not protect DNA.