Immunofluorescence Assay Technique
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Questions and Answers

Fluorescence is the property of certain molecules to absorb light at a longer wavelength and emit light at a shorter wavelength when it is illuminated by light of a different wavelength.

False

Immunofluorescence is a technique used to visualize specific proteins or antigens in tissue sections by binding a non-specific antibody chemically conjugated with a fluorescent dye.

False

The emitted light in fluorescence can be viewed with a normal light microscope.

False

Immunofluorescence can be used for the detection of antigens directed against antibodies already known to be present in a given tissue section or cell preparation.

<p>False</p> Signup and view all the answers

Fluorescein isothiocyanate (FITC) is a fluorescent dye that makes antibodies glow red microscopically under ultraviolet light.

<p>False</p> Signup and view all the answers

Immunofluorescence can be used to stain cell membrane molecules or tissue sections.

<p>True</p> Signup and view all the answers

Direct immunofluorescence is a double-layer technique.

<p>False</p> Signup and view all the answers

In indirect immunofluorescence, a fluorochrome-conjugated anti-immunoglobulin serum is applied directly to the tissue substrate.

<p>False</p> Signup and view all the answers

Indirect immunofluorescence is used to detect the presence of autoantibodies in a patient's serum.

<p>True</p> Signup and view all the answers

Fluorescein is used to conjugate the antibody in indirect immunofluorescence.

<p>False</p> Signup and view all the answers

Direct immunofluorescence is used to detect the distribution of a thyroid autoantigen.

<p>True</p> Signup and view all the answers

In direct immunofluorescence, the site where the antibody attaches will show red fluorescence.

<p>False</p> Signup and view all the answers

The fluorescence is brighter in the direct test than in the indirect test.

<p>False</p> Signup and view all the answers

The primary antibody needs to be conjugated with a fluorochrome in the indirect immunofluorescence technique.

<p>False</p> Signup and view all the answers

Immunofluorescence is only used for identifying bacterial species.

<p>False</p> Signup and view all the answers

Autoimmune diseases are characterized by antibodies directed against non-self-antigens.

<p>False</p> Signup and view all the answers

Fixation is used to revive the cell's functions.

<p>False</p> Signup and view all the answers

Immunofluorescence is not suitable for detecting autoantibodies.

<p>False</p> Signup and view all the answers

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