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:Substitution editing and Insertion/deletion editing.

Substitution editing 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.

*adenosine deaminases that convert an A to inosine,which the ribosome translates as a G.Thus a CAG codon (for Gln) can be converted to a CGG codon (for Arg).

*Insertion/deletion editing 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.

8 0

3 years ago

How many chemical bond does carbon form

irga5000 [103]

Answer:

four covalent bonds

Explanation:

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3 years ago

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Jonah observes the Sun through a special filtered telescope during a total solar eclipse. He sees a red ring and a faint white r

rewona [7]

The part of the sun that Jonah is seeing as he observes the sun through a filtered telescope during the total solar eclipse is that the red ring is the chromosphere and the faint white ring that looks like a crown is the corona.

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4 years ago

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PLZ HELP. Which of the following are structures of the central nervous system cheak all that apply A. Nerve cells outside the br

Reptile [31]

The brain and spinal cord are both structures of the central nervous system.

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3 years ago

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