Biotechnology and its Applications — BIOLOGY STD 12 Science — Question
Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology and its Applications2 Marks
Question
Discuss briefly how a probe is used in molecular diagnostics.
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Answer
A single stranded DNA or RNA, tagged with a radioactive molecule (probe) is allowed to hybridise to its complementary DNA in a clone of cells followed by detection using autoradiography. The clone having the mutated gene will hence not appear on the photographic film, because the probe will not have complementarity with the mutated gene.
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