Which of the Following Statements BEST Explains Why Only Pre-MRNA

question 15

Multiple Choice

Which of the following statements BEST explains why only pre-mRNA receives a 5'cap?

• A) The enzyme that initiates the capping step is known to associate with RNA polymerase II, which generates pre-mRNAs.
• B) Only pre-mRNAs contain proper sequences for the cap to be added on.
• C) The tail of the pre-mRNA can recruit the right combination of enzymes for capping.
• D) Nuclear pore complexes only recognize pre-mRNAs and allow them out to the cytoplasm for the capping process to begin.
• E) rRNA and tRNAs do not exit the nucleus to receive the cap via enzymes in the cytoplasm.

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