Immunological Techniques
Agarose gel electrophoresis and pulsed field gel electrophoresis may be used to resolve respectively

2000 kb and 20kb DNA
20 kb and 2000 kb DNA
1000 kb and l0kb DNA
10 kb and 1000 kb DNA

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Immunological Techniques
In Counter immunoelectrophoresis

the antibody will migrate towards cathode
the antibody will migrate towards anode
electrophoresis will drive the antibody and antigen toward each other
electrophoresis will drive the antibody and antigen parallel to each other

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Immunological Techniques
What would happen if serum is omitted from the ELISA, but all other steps remain same?

The OD values would be nearly the same as the assay control
Anti-human Ig-conjugate would bind non-specifically to the ELISA plate
Both (a) and (b)
Anti-human Ig-conjugate would not bind and be washed away

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