When DNA Is Heated to Just Below Boiling (90°C-95°C)

question 25

Multiple Choice

When DNA is heated to just below boiling (90°C-95°C) ,

• A)the sugar phosphate backbone of the DNA strands breaks.
• B)the sugar, phosphate, and base come apart in each nucleotide.
• C)the helix unwinds but hydrogen bonds between the bases remain intact.
• D)the two DNA strands separate completely.
• E)nothing happens until the boiling point is reached (100^oC).