What is the role of RNA polymerase in transcription? A) RNA polymerase signals the end of the mRNA molecule. B) RNA polymerase catalyzes the unwinding of the DNA double helix. C) RNA polymerase binds the DNA promoter and builds an mRNA molecule. D) RNA ...
The initiation of transcription is the first step in gene expression as it results in the copying of a gene's DNA sequence to make an RNA molecule.Answer and Explanation: Transcription is carried out by RNA polymerase enzymes and a number of accessory proteins called transcription factors. These...
The timing of transcription depends largely on the gene. Some genes that encode housekeeping proteins are transcribed all the time; other genes are transcribed only in response to a signal from the cell’s environment. As you likely know, RNA transcription is initiated from promoter elements that...
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In eukaryotes, gene regulation occurs at the level of transcription with the help of certain regulatory proteins. Which proteins encourage binding of the RNA polymerase to the promoter? (a) Describe gene regulation in prokaryotes and eukaryotes. (b) Why it is important to each of them?
In the case of Drosophila, there have been several attempts of demonstrating activation of TEs associated to temperature. Although experiments on transcription rates of some TEs seem to demonstrate a response to thermal gradients (Strand and McDonald, 1985), there is not a consensus relative to ...
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What are the three steps in a PCR cycle, and what does each step accomplish? Discuss how PCR can be used to replicate DNA and why it is such a useful tool. A) What are two sources of template DNA for PCR? B) How is cDNA generated? How will the detection of...
1.) What does RNA polymerase do in transcription? 2.) What is the end product of transcription? The tRNA molecule binds a start codon of the mRNA molecule during: A) elongation. B) initiation. C) transcription. D) termination. Which site in mRNA facilitates the correct positioning of ribos...
What are the raw materials for DNA synthesis? What converts RNA primer to DNA? What does transcription do in protein synthesis? What is the polarity of DNA synthesis? What substrates are used in the DNA synthesis reaction? What is the function of RNA primer during protein synthesis?