Which statement best differentiates transcriptional regulation from translational regulation?

• A. Transcriptional regulation controls RNA production; translational regulation controls translation efficiency and timing.
• B. Transcriptional regulation controls RNA production; translational regulation controls RNA splicing.
• C. Transcriptional regulation occurs after translation; translational regulation occurs before transcription.
• D. Transcriptional regulation controls RNA production; translational regulation controls translation efficiency and timing.

Answer: (D)