BioScience Dictionary

 
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Found Polymerase chain reaction 2 times.

Displaying results 1 to 10.

1. Polymerase chain reaction (PCR)
A method for amplifying a DNA base sequence using a heat- stable polymerase and two 20-base primer s, one complementary to the (+)-strand at one end of the sequence to be amplified and the other complementary to the (- )-strand at the other end. Because the newly synthesized DNA strands can subsequently serve as additional templates for the same primer sequences, successive rounds of primer annealing, strand elongation, and dissociation produce rapid and highly specific amplification of the desired sequence. PCR also can be used to detect the existence of the defined sequence in a DNA sample.

2. Polymerase chain reaction (PCR)
A method of amplifying or copying DNA fragments that is faster than cloning. The fragments are combined with DNA polymerase , nucleotides , and other components to form a mixture in which the DNA is cyclically amplified.