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: 7506

#Part-A Aptitude & General Biotechnology

A man sitting in a train which is travelling at 50 kmph observes that a goods train,travelling In opposite direction,takes 9 seconds to paas him. If the goods train is 280 m long,Find its speed.

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#Question id: 7507

#Part-A Aptitude & General Biotechnology

The lengths of trains A and B are 250 m 300 m respectively and their speeds are 70 km/h and 79 km/h respectively. They are walking in the same direction. In how much time will train B cross a passenger sitting in A?

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#Question id: 7508

#Part-A Aptitude & General Biotechnology

A boat running downstream covers a distance of 12 km in 2 h while for covering the same distance upstream it takes 3 h. What is the speed of the boat in still water?

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#Question id: 7509

#Part-A Aptitude & General Biotechnology

A boatman goes 3 km against the current of the stream in 1 h and goes 1 km along the current in 15 min. How long will it take to go 7 km in stationary water?

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#Question id: 7510

#Part-A Aptitude & General Biotechnology

A boat running upstream takes 5 h 12 min to cover a certain distance, while it takes 4 h to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?

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#Question id: 7511

#Part-A Aptitude & General Biotechnology

A man can row 19/2 km/h in still water. If in a river which is running at 5/2 km/h, it takes him 1 h 35 min to row to a place and back, how far off is the place?