Suppose You Add Fluorescent Ribonucleotides to a Cell Undergoing DNA

question 117

Multiple Choice

Suppose you add fluorescent ribonucleotides to a cell undergoing DNA replication so that the RNA primers used in DNA synthesis glow when viewed with a fluorescent microscope. You notice that, near each replication fork, one strand glows more than the other. Which strand is it that glows more, and why?

• A)The leading strand glows more because it is elongated nearest the replication fork.
• B)The leading strand glows more because it forms the "trombone loop."
• C)The lagging strand glows more because its RNA primer is nearer the replication fork.
• D)The lagging strand glows more because it forms the "trombone loop."