Biotechnology and its Applications — BIOLOGY STD 12 Science — Question
Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology and its Applications2 Marks
Question
How is early detection of infectious diseases possible by molecular diagnosis?
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Answer
Molecular diagnostics:
Low concentration of viral or bacterial DNA in a host body can be detected (much before the symptoms of the disease appear) by polymerase chain reaction amplification).
Clones of genes can be used as probes to detect the presence of complementary (normal) strands of DNA in a mutant-clone, hybridisation does not occur and hence, the radioactivity does not appear in the autoradiography) photographic films.
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