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#Question id: 1740


Activation of resting B-cells by T-helper cells depends directly upon costimulatory interaction between:

#XL - Q Biochemistry
  1. CD40 and CD40L

  2. B7 and CD28

  3. B7 and CTLA-4

  4. CD4 and MHC class II


Answer:- Option(s): 1


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#Question id: 2665

#XL - T Zoology

A transposon ____________.

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