Which process describes the flow of genetic information from DNA to protein, beginning when mRNA leaves the nucleus and is read at the ribosome?

Which process describes the flow of genetic information from DNA to protein, beginning when mRNA leaves the nucleus and is read at the ribosome?

• A. Translation
• B. Transcription
• C. Replication
• D. Splicing

Answer: (A)

The flow described is translation. After mRNA exits the nucleus, the ribosome reads its codons and uses tRNA to bring the correct amino acids, building a polypeptide chain that folds into a protein. This step translates the nucleotide sequence into an amino acid sequence according to the genetic code, starting at a start codon and ending at a stop codon. This is different from transcription (making RNA from DNA in the nucleus), replication (copying DNA), and splicing (editing pre-mRNA).

The flow described is translation. After mRNA exits the nucleus, the ribosome reads its codons and uses tRNA to bring the correct amino acids, building a polypeptide chain that folds into a protein. This step translates the nucleotide sequence into an amino acid sequence according to the genetic code, starting at a start codon and ending at a stop codon. This is different from transcription (making RNA from DNA in the nucleus), replication (copying DNA), and splicing (editing pre-mRNA).