00:04
Polymerase chain reaction pcr technique it was a breakthrough in genetic science the technique is simple a sample of dna is provided with a heat resistant supply of ionia polymerase and is repeatedly heated the heat speeds the dna molecules open and after only a few interactions of heating and recombination the sample has grown exponentially the technique polymerase chain reaction rapidly replicate specific dna fragments without croning bacterial cells.
01:24
Thus the answer if polymerase chain reaction is correct.
01:51
Option a, which is gel electrolysis.
02:06
Zylectrophosis is a technique for separating molecules of different sizes in a polarize gel medium.
02:44
The technique is similar to a centrifuge but instead of centrifugal, driving the density gradient and electric field does.
02:53
Thus, option a is incorrect.
03:01
Next, option b, which is complementary dna libraries.
03:30
Complementary dna libraries are collections of genes that have already been studied, sorry, have already been mapped out into identifiable sequences...