Final answer:
The three components of a gene/immature RNA are the Promoter for initiation, Exon for coding, and Intron as an intervening sequence. Together, they regulate gene expression and help produce functional mRNA that can be translated into proteins.
Step-by-step explanation:
The three components of a gene/immature RNA mentioned in your schoolwork question and their roles are as follows:
- Promoter (initiation): This is a region of DNA where RNA polymerase attaches and begins the transcription of mRNA from DNA.
- Exon (coding): Exons are protein-coding sequences within a gene. They are called 'exons' because they are 'expressed' or translated into protein.
- Intron (intervening sequence): Introns are non-coding sequences found within genes. They are interspersed between exons and are removed from the pre-mRNA during processing. Though introns do not encode for proteins, they may play roles in gene regulation.
Therefore, the correct answer to the components of a gene/immature RNA is d) Promoter (initiation), Exon (coding), Intron (intervening sequence).