In Drosophila, the X chromosome appears to encode four protein factors that activate the early promoter of Sxl. Which of the following factor activate JAK-STAT pathway?

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#Question id: 18778

#Unit 13. Methods in Biology

which of the following technique provides an unusually powerful technology for the quantitative analysis and sorting of cell populations labelled with one or more fluorescent antibodies.

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#Question id: 18779

#Unit 13. Methods in Biology

Flow-cytometric analysis for the detection and measurement of subpopulations of leukocytes, including those of leukaemia, is usually performed using monoclonal antibodies. Why is this the case?

Choose whether each of the following statements is true 

a) Indirect immunofluorescence is a more sensitive technique than direct immunofluorescence

b) Most antigens induce a polyclonal response. 

c) For precipitation to occur, both antigen and antibody must be multivalent.

d) ELISA tests using chemiluminescence are more sensitive than chromogenic ones and precipitation tests are more sensitive than agglutination tests

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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

TLS Online TPP Program

#Question id: 18783

#Unit 13. Methods in Biology

Sensitivity of various immunoassays are given match them correctly

Assay	Sensitivity∗ (g 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