Precipitation Reactions and Antibody Interactions

Precipitation Reactions and Antibody Interactions

Assessment

Interactive Video

Biology, Chemistry, Science

11th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video explains antigen-antibody reactions, focusing on precipitation reactions. It covers immune complex formation, conditions for precipitation, and the impact of antigen-antibody proportions. The precipitation curve is introduced, highlighting zones of antibody excess, equivalence, and antigen excess. Future topics include techniques based on precipitation reactions.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary basis for using antigens and antibodies in diagnostic immunology?

Their ability to dissolve in solutions

Their highly specific reactions

Their non-specific interactions

Their ability to form covalent bonds

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is required for the formation of a visible precipitate in a precipitation reaction?

Equal proportions of antigens and antibodies

Presence of a strong acid

Antigens that are insoluble

Antibodies with at least one antigen binding site

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which condition is NOT necessary for precipitation reactions?

Presence of an electrolyte

Antigen solubility

High temperature

Suitable pH

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a test sample where antibodies are in excess, what is the result?

Formation of large insoluble complexes

Maximum precipitation

Antigen excess

No lattice formation

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens in the zone of equivalence in a precipitation curve?

Antibody excess

No precipitation occurs

Antigen excess

Maximum lattice formation

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the x-axis represent in a precipitation curve?

Amount of precipitate

Time

Concentration of antibody

Concentration of antigen

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the zone of antigen excess, what is the outcome?

Maximum lattice formation

No lattice formation

Antibody excess

Equal proportions of reactants

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