Which is the best definition of noncoding RNA?
A) A mutant mRNA that is not capable of making a protein.
B) Any RNA sequence that is not translated to make a protein
C) Any RNA sequence in an mRNA, or in the primary transcript used to make the mRNA, that is not translated to make a protein.
D) A functional RNA that is not translated to make a protein.

Question

Quizplus · Accepted Answer

Noncoding RNA refers to functional RNA molecules that are not translated into proteins. These include regulatory RNAs such as microRNAs and ribosomal RNAs. Choices A and B are too narrow in their definition, as not all noncoding RNAs are mutants or completely unrelated to protein production. Choice C is closer to the correct definition, but it also includes noncoding RNA within a coding mRNA, which is not necessary for the definition.

Which Is the Best Definition of Noncoding RNA