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>
Jan Ingenhousz discovered photosynthesis
Answer:
To survive in drought conditions, plants need to decrease transpiration to limit their water loss. Some plants that live in dry conditions have evolved to have smaller leaves and therefore fewer stomata. Extreme examples are plants with leaves that resemble spiky thorns or spines.
Answer: The wooded area and the stream refer to:
→ the rabbit's " habitat " .
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Answer;
D. identical, diverse
Daughter cells produced when cells undergo mitosis are genetically identical, and daughter cells produced when cells undergo meiosis are genetically diverse.
Explanation;
Meiosis and mitosis are the two major types of cell division. Mitosis takes place in the somatic cells (body cells) in which parent cells undergo division to yield daughter cells that have similar number of chromosomes as the parents. Meaning the daughter cells are identical to the parent cells in terms of genetic material composition.
Meiosis on the other hand, involves division in the germ-line cells in which parent cells divides to yield daughter cells that contain half the number of chromosomes as the parent, meaning that they are not genetically identical, however they re genetically diverse due to the process of crossover and recombination.
