Answer:
If contain, the colorant stays, if not, it washes.
Explanation:
The ELISA inmmunoassay experiment consists on adding to an antibody a sample with a colorant, if the sample contains an antigen, it will stick to its proper antibody and te colorant will remain. If not, when the laboratory worker washes the sample after adding the sample, the colorant and the sample will be gone because there wasn´t an antigen on the sample that fitthe antibody. In that case, the result will be negative.
