A living cytoplasmic connection penetrate the walls between sieve tube elements and their companion cells; which are often complex and branched on the companion cell side, known as

TLS Online TPP Program

#Question id: 18779

#Part-A Aptitude & General Biotechnology

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

#Part-A Aptitude & General Biotechnology

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

TLS Online TPP Program

#Question id: 18781

#Part-A Aptitude & General Biotechnology

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

TLS Online TPP Program

#Question id: 18782

#Part-A Aptitude & General Biotechnology

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

TLS Online TPP Program

#Question id: 18783

#Part-A Aptitude & General Biotechnology

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

#Part-A Aptitude & General Biotechnology

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