Question

Order the following steps from transcription through the initiation of translation?

1) Transcription, RNA processing, mRNA export, translation initiation
2) Transcription, translation initiation, RNA processing, mRNA export
3) Transcription, mRNA export, RNA processing, translation initiation
4) Transcription, RNA processing, translation initiation, mRNA export

Answer 1

The correct order from transcription to translation initiation is transcription, RNA processing, mRNA export, translation initiation, which matches option 1 in the provided choices.

Step-by-step explanation:

The correct order of the steps from transcription through the initiation of translation would be transcription, RNA processing, mRNA export, and translation initiation. This sequence accurately reflects the processes involved in the synthesis of proteins from a gene within the DNA. Here's a step-by-step explanation:

1. Transcription: This is the first step, where RNA polymerase synthesizes a pre-mRNA transcript using the genetic code in DNA as a template.
2. RNA processing: Here, the pre-mRNA undergoes splicing, editing, and polyadenylation to become a mature mRNA molecule.
3. mRNA export: Once processed, the mRNA is exported from the nucleus to the cytoplasm where translation will occur.
4. Translation initiation: Translation begins with the assembly of the initiation complex at the start codon of the mRNA, marking the start of protein synthesis.

Therefore, the correct order is given by option 1) Transcription, RNA processing, mRNA export, translation initiation.