Paragraph 1: Describe Transcription – such as . . .What are the 3 steps involved
ID: 78951 • Letter: P
Question
Paragraph 1: Describe Transcription – such as . . .What are the 3 steps involved . What enzyme is used. How does prokaryotic transcription differ from eukaryotic transcription . . .etc.
Paragraph 2: Describe Translation – such as . . .What are the steps of this process . . .what molecule is synthesized. . . .etc.
Paragraph 3: Describe co-translational sorting of proteins. What organelles are involved. . .
Describe post-translational sorting of proteins. What organelles are involve . . .
How is it determined which mechanism is used?
Explanation / Answer
Transcription is a biochemical process of transferring the information in a DNA sequence to an RNA molecule or in other words synthesis of RNA strand from a DNA template. The transcription includes three major steps: Initiation, elongation and termination. The enzyme RNA polymerase mediates the complete process of transcription. In the initiation step, the enzyme binds to the promotor region and the DNA get unwind. There intiates the making of new strand of mRNA with complementary sequence of bases. In the elongation step, addition of nucleotides to the mRNA strand for the elongation. And in the final termination step, ending of transcription occurs when RNA polymerase crosses termination sequence.
Translation is the process of synthesis of protein from the information contained in a mRNA molecule synthesised by transcription. The steps involved in translation are:
The translation produces a polypeptide chain which act as a functional protein in the cell.
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