The N-terminal half of phytochrome contains three types of domain, which of the following contain bilin-lyase activity, which binds the chromophore?

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#Question id: 11130

#Unit 7. System Physiology – Animal

Which of the following electrical events is characteristic of inhibitory synaptic interactions?

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#Question id: 5636

#Unit 5. Developmental Biology

It appears that the oocyte and its accompanying cumulus cells secrete molecules that attract capacitated (and only capacitated) sperm toward the egg during the last stages of sperm migration. one of the chemotactic compound appears to be the

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#Question id: 2609

#Unit 2. Cellular Organization

trp Operon structures involves,

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#Question id: 14884

#Unit 4. Cell Communication and Cell Signaling

Which types of cell shows the middle affinity towards the self proteins? 

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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