A Double-Stranded DNA Molecule Can Be Separated into Single Strands

question 41

Multiple Choice

A double-stranded DNA molecule can be separated into single strands by heating it to 90°C because

• A)heat disrupts the hydrogen bonds holding the sugar-phosphate backbone together.
• B)DNA is negatively charged.
• C)heat disrupts hydrogen-bonding between complementary nucleotides.
• D)DNA is positively charged.

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