Question

Which one is present in translational unit?

• A. Promoter
• B. Structural gene
• C. Terminator
• D. Non-sense codon

Answer 1

Answer: (B)

Structural gene

Answer 2

The translational unit refers to the coding region of mRNA that is actually translated into a protein.

• The promoter is a DNA region that initiates transcription, not part of mRNA.
• The terminator signals the end of transcription, also not translated.
• A non-sense codon (if appearing due to mutation) is not normally present in a functional mRNA.
• Therefore, the structural gene, which is the coding information directly translated into the protein, is present in the translational unit.