a microtitration plate including a frame made of a stiff first plastic which has a plate with a multiplicity of holes , and a multiplicity of vessels made of a second plastic suited for the pcr and / or exhibiting permeability to oxygen , which are fixedly connected to the plate by directly molding them to the holes , have a receiving portion protruding from the underside of the plate , and are accessible from the upper surface of the plate through apertures .