Question

What must happen to a DNA molecule before RNA polymerase can make RNA?

Answer 1

The double strand helix is opened by enzymes called helicase and this allow the RNA polymerase to copy the DNA strand.

Answer 2

Helicase (enzyme) unwinds the DNA strand. Then polymerase builds an RNA strand which is anti-parallel of the original DNA (or half the DNA) strand. Instead of Thymine (T), it is replaced by Uracil (U).

This process is called transcription.

Answer 3

thank you