A mutation in an E. coli cell becomes active half-way through a round of replication. The cell completes the round of replication normally but then cannot start a second round. Which protein could be mutated?

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#Question id: 18780

#Unit 13. Methods in Biology

Which of the following does not participate in the formation of antigen-antibody complexes?

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#Question id: 18781

#Unit 13. Methods in Biology

In which of the following case a large lattice is formed?

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#Question id: 18782

#Unit 13. Methods in Biology

The concentration of a small amount antibodies 2 μg antibody/ml can be detected

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#Question id: 18783

#Unit 13. Methods in Biology

Sensitivity of various immunoassays are given match them correctly

Assay	Sensitivity* (μg antibody/ml)
a) Mancini radial immunodiffusion	i) 2
b) Ouchterlony double immunodiffusion	ii) 20–200
c) Immunoelectrophoresis	iii) 20–200
d) Rocket electrophoresis	iv) 10–50

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#Question id: 18784

#Unit 13. Methods in Biology

Which of the following is the sine qua non (without which, nothing) of the modern immunologist’s toolbox.

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#Question id: 18785

#Unit 13. Methods in Biology

Flow cytometry is based on