Which type of RNA carries instructions from DNA in the nucleus to the ribosome?

Which type of RNA carries instructions from DNA in the nucleus to the ribosome?

• A. mRNA
• B. tRNA
• C. rRNA
• D. snRNA

Answer: (A)

Messenger RNA carries the instructions from DNA in the nucleus to the ribosome. During transcription, the gene’s sequence is copied into mRNA, which then exits the nucleus and travels to a ribosome in the cytoplasm. The ribosome reads the mRNA’s codons and uses tRNA to bring the matching amino acids, building a protein. Other RNA types have different jobs: tRNA delivers amino acids but doesn’t carry the genetic code; rRNA forms and helps the ribosome function; snRNA helps splice pre-mRNA in the nucleus. This setup illustrates the flow of genetic information from DNA to RNA to protein, with mRNA serving as the messenger.

Messenger RNA carries the instructions from DNA in the nucleus to the ribosome. During transcription, the gene’s sequence is copied into mRNA, which then exits the nucleus and travels to a ribosome in the cytoplasm. The ribosome reads the mRNA’s codons and uses tRNA to bring the matching amino acids, building a protein. Other RNA types have different jobs: tRNA delivers amino acids but doesn’t carry the genetic code; rRNA forms and helps the ribosome function; snRNA helps splice pre-mRNA in the nucleus. This setup illustrates the flow of genetic information from DNA to RNA to protein, with mRNA serving as the messenger.