Edexcel GCSE Biology · 1BI0
Specification 5.22B · Paper 1
Revise: Monoclonal Antibodies in Pregnancy TestingMany coloured beads accumulate in one place, producing a visible coloured test line.
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GCSE Biology · key term
The region that becomes coloured when the target substance, such as hCG, has been detected.
Used by Edexcel
Specification 5.22B · Paper 1
Revise: Monoclonal Antibodies in Pregnancy TestingMany coloured beads accumulate in one place, producing a visible coloured test line.
For an explanation question, give the whole sequence: hCG in urine binds to labelled monoclonal antibodies; the complexes move along the strip; they bind to immobilised antibodies; the accumulated label forms a coloured test line.
Distinguish the test line from the control line: the test line indicates detected hCG, while the control line shows that the test has operated correctly.
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