Restriction endonuclease
This is done on a cellular level in a complex process called "protein synthesis". To my knowledge, no human has ever been able to copy or reproduce a DNA molecule. They are too complex. Different DNA molecules are used to code for different proteins; the portion of the DNA molecule used to code can be called a 'gene'.
They use a restriction enzyme, which recognizes the sequence they want to cut at and cut there, effectively snipping a small sequence out of the main one.
Restriction endonuclease
restriction endonuclease
Restriction endonuclease
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restriction endonuclease
Complementary DNA (cDNA) is DNA that has been copied from an mRNA through a reverse transcriptase enzyme. cDNA contains a copy of the original DNA sequence that made the mRNA - but without the introns (as these are cut out to create mRNA).
It could be cut for many reasons. When undergoing meiosis, DNA is cut to create novel gene arrangements on chromosomes. DNA can also be damaged by mutagens like UV light, and will be cut by certain enzymes to help in the repair on the DNA. In the lab, biologist cut DNA to insert genes, knock out genes, or to ensure that the gene is there. These are just a few reasons, but it is useful to cut DNA both in the lab and in the organism.
DNA is cut by a special kind of enzymes called restriction enzymes.
restriction endonuclease
Restriction endonuclease.
Restriction endonuclease.
Restriction endonuclease.
Restriction endonuclease.
Restriction endonuclease
Restriction endonuclease
Restriction endonuclease
They are called restriction enzymes and there are all sorts depending on the sequence of DNA they are trying to cut
restriction endonuclease
Chemical mutagens are used to change DNA sequences, (bacterial) enzymes are used to cut and copy DNA, and repressors are used to prevent the expression of genes.
Because restriction enzymes recognised site normally are more than one.For example, if an enzyme recognise three Base pair such us AAA and the copy segment of DNA has 5 AAA segment than the enzyme will cut the DNA into 5 picies.
obtain DNA with the desired gene, cut the DNA into pieces, copy the pieces of DNA, identify copies of the desired gene, and transfer the desired gene to the recipient organism. for Plato the answer is A. not B. C. or D.