The process of RNA editing is the alteration of the sequence of nucleotides in the RNA after it has been transcribed from DNA, but before it is translated into a protein. RNA editing occurs by two distinct mechanisms:<em><u /><u>Substitution</u> <u>editing </u></em>and <u><em>Insertion/</em></u><em></em><u><em>deletion</em></u><em> <u>editing</u></em>.
<u><em>Substitution editing</em></u> is the chemical alteration of individual nucleotides. These alterations are catalyzed by enzymes that recognize a specific target sequence of nucleotides:
*Cytidine Deaminases that convert a C in the RNA to uracil.
*<em />adenosine deaminases that convert an A to inosine,which the ribosome translates as a G.<span>Thus a CAG codon</span><span> (for Gln) can be converted to a CGG codon (for Arg).
<em><u>*Insertion/deletion editing</u></em><em><u /></em><u /> is the insertion or deletion of nucleotides in an RNA.
These alterations are mediated by guide RNA molecules that base-pair as best they can with the RNA to be edited and serve as a template for the addition( or removal) in the target.</span>
Answer:
prime mover sometimes called the agonist,is the muscle that provides the primary force driving the action
Answer: varve analysis
<span>The word varve originated from the Swedish word varv which means revolution in layers and circle. In this particular question, by “varve” we mean an annual layer of sedimentary rocks and varve analysis is the process by which archaeologists can calculate precise dates based on these sediments with known climatic patterns. </span>
It means DNA if it's about genes
Answer:
A Scanning Electron microscope
Explanation:
A scanning electron micriscope beams focused rays of electrons at the outer surface of the cell get a very highly maginified and detailed image of the surface structures. Some disadvantages include that the cell must be dead in order to be examined this way, and this type of microscope is very expensive compared to a light microscope.
