Immunological Techniques
An antigen preparation and an antibody preparation are tested by immunodiffusion. Three bands are found, indicating that

there was one antibody and one antigen
the antibody was impure
the temperature was too high
there was more than one antigen

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Immunological Techniques
Different form of a plasmid, on an agarose gel, after electrophoresis may be in which of the following sequence in decreasing molecular weight?

Linear plasmid, open circular, super coiled plasmid
Open circular, super coiled, linear plasmid DNA
Open circular, linear plasmid, super coiled plasmid
Open circular, super coiled, linear plasmid DNA

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Immunological Techniques
In Rocket Immunodiffusion the length of the rocket is

proportional to the amount of antigen placed in each well
proportional to the amount of antibody placed in each well
inversely proportional to the amount of antigen placed in each well
inversely proportional to the amount of antibody placed in each well

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