Agarose extracted from seaweeds finds use in:
Spectrophotometry
Tissue culture
PCR
Gel electrophoresis
As learnt in
Gel Electrophoresis -
This technique is used to separate DNA fragments on the basis of charge and size. Agarose is a polysaccharide which is extracted from red algae (gelidium).
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Option 1)
Spectrophotometry
This option is incorrect
Option 2)
Tissue culture
This option is incorrect
Option 3)
PCR
This option is incorrect
Option 4)
Gel electrophoresis
This option is correct