mRNA Formation Processes

Steps:

• Identify key stages of mRNA synthesis: transcription (initiation and elongation) and post-transcriptional modifications (5' capping and poly-A tail addition).
• Match these to numbered processes, assuming standard biology: 1 likely transcription initiation/elongation, 4 likely capping or polyadenylation.
• Eliminate translation (not part of mRNA formation) and splicing (occurs after initial formation).
• Select option combining transcription and a primary modification.

Why B is correct:

• B (1 and 4) aligns with transcription and essential 5' capping, core to eukaryotic mRNA formation per central dogma.

Why the others are wrong:

• A includes 2 (likely translation, post-mRNA).
• C omits transcription (3 and 4 only, incomplete).
• D lacks transcription (2 and 4, misses core step).

Not enough information on exact definitions of 1–4.

Final answer: B