Which of the following is the earliest step in transcription? A. RNA polymerase encounters a termination signal, and the DNA mol
ecule is released. B. Complementary RNA nucleotides are synthesized and added to the mRNA molecule. C. Introns are excised from the pre-mRNA strand. D. RNA polymerase binds to the promoter on the template strand of DNA.
Answer: D. RNA polymerase binds to the promoter on the template strand of DNA.
Explanation: The first step in transcription is termed initiation step. In this step, the enzyme RNA polymerase binds to a region or section of a gene called the promoter. This specific action results to the signalling of the DNA to unwind so the enzyme can decode the bases in the DNA strands. The enzyme now make a strand of mRNA with contemporary bases.
<span>The scientist who melted glass to simulate a microscope was Robert Hooke, in 1660. He was an English physicist, and he looked at insects and handheld objects. He named the cell for the cell of a monk, because to him it appeared to be a self-contained room.</span>
