A culture was started by inoculating the medium with 100 cells having a generation time of 2 hours. Assuming the culture grows in ideal synchrony, what will be the number of cells in the culture at 8 hours?

TLS Online TPP Program

#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

TLS Online TPP Program

#Question id: 18780

#Unit 13. Methods in Biology

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

TLS Online TPP Program

#Question id: 18781

#Unit 13. Methods in Biology

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

TLS Online TPP Program

#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

TLS Online TPP Program

#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.