Which of the Following Is Evidence That RNA Was a Message-Carrying

Multiple Choice

Which of the following is evidence that RNA was a message-carrying intermediary between DNA and protein?

A) A hydroxyl group is present on ribose.
B) RNA is single stranded and thus cannot be copied by semiconservative replication in a manner similar to DNA.
C) RNA structure includes a molecular code,proving that it carries a genetic message.
D) RNA is produced in the nucleus (with DNA) and then migrates to the cytosol,the location of protein synthesis.
E) Pulse-chase experiments revealed RNA to be exclusively localized to the nucleus.