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A level Biology: Post your doubts here!

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The q was simple.B for bone marrow and t for thymus. SO Option A and B out so it has to be C or D.
mediated response occurs only in T so option D
 
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The q was simple.B for bone marrow and t for thymus. SO Option A and B out so it has to be C or D.
mediated response occurs only in T so option D
But our pblm is with antigen presentation...isn't it only the job of macrophages??
 
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B cells do act as antigen presenting cells but it is really complex.Mr genius did some research haha.So then I was like tf and say the examiner report and well:
 
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