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Many genes in both prokaryotes and eukaryotes contain many sequences that can cause pauses or prematurely terminate transcription. Nevertheless, the genes within a cell normally produces multiple RNAs that may be thousands of nucleotides long without pausing or terminating prematurely. However, when a single round of transcription occurs on such templates in a test tube, RNA synthesis is frequently interrupted by pauses and premature terminations, which reduces the transcriptional rate and frequently shorten the length of the mRNA molecules. Most pauses and terminations occur when RNA polymerase temporarily backtracks for one or two nucleotides along the DNA. Experimental findings have demonstrated that most transcriptional delays and premature terminations disappear if several RNA polymerases are transcribing the DNA simultaneously. Propose an explanation for faster transcription and longer mRNA when the template DNA is being transcribed by multiple RNA polymerases.
Suppose that the length of ten base pairs of DNA found in one turn of the helix is 34 A, what is the average length of a human chromosome in centimeters?
The view of anti-psychiatrists like Scheff was that mental illness was:
A white bison was born in a renchers herd. when it matured, the rancher mated it with a normal bison on three occasions, and each time a normally colored bison was born.
Parasites such as pinworms are often found in high densities in select human populations. What are the abiotic factors that you may consider if trying to control this parasite in a day care. If you are asked to design an epidemiological study of this..
The rapid rate of reproduction combined with the many different mutations has had a limiting effect on the effectiveness of HIV therapy using antibiotics. Without the mutations the virus would fall victim to antibiotics.Are there other viruses whi..
How will the signaling of a neuron be affected if the voltage- gated sodium channels open at a more negative membrane potential? How will the excitability of a neuron be affected by sodium channels that open at more positive membrane potentials?
An electron is released from rest at the negative plate. What is the electron's speed when it reaches the positive plate?
if many trees are removed from a forest by logging, what is the most immediate effect on the carbon cycle in that forest?
A particular cytosine (C) is upstream of a particular guanine (G) within a protein-encoding gene.
Draw a flow diagram (ie pictures with concise labels) for the experimental protocol tobe following in an experiment for the Transforming principal.
the breakdown of atp releases energy which is utilized by other reactions that require energy. identify other examples
Why cant microbes that naturally clean up the environment continue to do so as in the past? How have humans made their task harder? Easier?
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