How to identify GM food

Tests for GM Foods
PCR or Polymerase Chain Reaction is a technique used to test for GM food. The polymerase chain reaction is a technique for the intensification of DNA in the laboratory.
The DNA sample has to be enlarged about a million times producing a large number of copies of a DNA sequence so that its size, sequence etc. can be determined. The exact stretch of DNA to be amplified is known as the target sequence which is recognized by a specific pair of DNA primer. Hence make an exact copy of DNA sequence to be identified.
PCR is accurate, but may be complicated and expensive especially for the less developed countries to invest in this kind of sophisticated genetic testing. Identifying GM foods that are containing in processed foods such as baby food are another problem faced.

Reference:
Available at:
http://www.agnet.org/library/nc/139a/
(accessed 29 June 2008)

Regards
Aziyani