Question

which of the following forms of rna represent exceptions to the central dogma, which states that rnas are translated into protein?
ribosomal rna (rrna)
rna polymerase
messenger rna (mrna)
transfer rna (trna)

Explanation:

• Ribosomal RNA (rRNA): Forms part of ribosomes (protein - synthesizing machinery), but is not translated into a protein itself.
• RNA polymerase: Is an enzyme (a protein), not an RNA that is an exception in the context of RNA being translated (it is involved in RNA synthesis from DNA).
• Messenger RNA (mRNA): Carries genetic information from DNA to ribosomes for translation into proteins, so it follows the central dogma.
• Transfer RNA (tRNA): Helps in the translation process by bringing amino acids to the ribosome, but is not translated into a protein.

Answer:

Ribosomal RNA (rRNA), Transfer RNA (tRNA)