Question
Practice question
Which of the following scenarios best describes how a COVID-19 Rapid Antigen Test works?
O a. A COVID-19 Rapid Antigen Test is an example of a lateral flow assay. When a positive sample is
added to the test well and starts to flow along the device, the labelled primary antibody binds to the
antigen. The immobilised unabelled secondary antibody captures the antigen bound to the labelled
primary antibody, generating the first visible (test) fine in the viewing area. The immobilised
unlabelled primary antibody captures the labelled primary antibody, generating the second visible
(control) line in the viewing area.
O b. A COVID-19 Rapid Antigen Test is an example of a lateral flow assay. When a positive sample is
added to the test well and starts to flow along the device the labelled primary antibody binds to the
antigen. The immobilised unfabelled primary antibody captures the antigen bound to the labelled
primary antibody, generating the fret visible (test) line in the viewing area. The immobilised
untabelled secondary antibody captures the labelled primary antibody, generating the second visible
(control) line in the viewing area
O c. A COVID-19 Rapid Antigen Test is an example of a lateral flow assay. When a positive sample is
sdded to the test well and starts to flow along the device, the labelled secondary antibody binds to
the antigen. The immobilised unlabelled secondary antibody captures the antigen bound to the
labelled secondary antibody, generating the first visible (test) line in the viewing area. The
immobilised unlabelled primary antibody captures the labelled secondary antibody, generating the
second visible (control) line in the viewing area.
O d. A COVID-19 Rapid Antigen Test is an example of a lateral flow assay. When a positive sample is
added to the test well and starts to flow along the device, the labelled secondary antibody binds to
the antigen. The immobilised unlabelled primary antibody captures the antigen bound to the labelled
secondary antibody, generating the first visible (test) line in the viewing area. The Immobilised
unlabelled secondary antibody captures the labelled secondary antibody, generating the second
visible (control) line in the viewing area.
Answer
The correct answer is option B. A COVID-19 Rapid Antigen Test is an example of a lateral flow assay. When a positive sample is added to the test well and starts to flow along the device, the labelled primary antibody binds to the antigen. The immobilised unlabelled primary antibody captures the antigen bound to the labelled primary antibody, generating the first visible (test) line in the viewing area. The immobilised unlabelled secondary antibody captures the labelled primary antibody, generating the second visible (control) line in the viewing area.