- Gene is a segment of DNA.
- Transcription is the process of formation of RNA from DNA. It is catalyzed by the enzyme RNA polymerase.
- Translation is the process by which the genetic code contained within a messenger RNA is decoded to produce a specific polypeptide chain. Each genetic code specifies a particular amino acid.
The expression of a gene to form a polypeptide occurs in the following steps-
- The first step is transcription ( mRNA synthesis from the gene)
- The second step is translation ( polypeptide synthesis from mRNA).
So, the correct answer is option a. transcription and then translation
Other options-
b. replication and then translation - incorrect ( Replication is the process by which two identical DNA molecules are produced from the parent DNA molecule.)
c. translation and transcription - incorrect ( the first step is transcription )
d. replication and then transcription - incorrect ( this will produce mRNA)
e. transcription and then replication - incorrect ( for protein synthesis transcription is followed by translation )
Learn more about protein synthesis-
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