1-4

Question 1

Pattern recognition receptors (PRR) include which of the following?

Answer 1

Toll-like receptors

Question 2

The titre of antibody is:

Answer 2

The highest dilution of an antiserum that still react with antigen in serological reactions

Question 3

The difference between agglutination and precipitation is in:

Answer 3

Size, solubility and location of antigen

Question 4

The main deficiency of quantitative assays based on precipitation is:

Answer 4

Lack of sensitivity

Question 5

Which of the following immune-diffusion assays is for quantitative determination of antigen:

Answer 5

Single radial immune-diffusion

Question 6

Ouchterlony’s precipitation is used:

Answer 6

Only for determination of antigen or antibody presence

Question 7

Antibody is added to agarose used for:

Answer 7

Single radial immunodiffusion

Question 8

Result of immune-precipitation in the gel is visible after at least:

Answer 8

24 h incubation at room temperature

Question 9

The precipitation band has:

Answer 9

White colour

Question 10

Which of the following immunoelectrophoresis is for quantitative determination of antigen:

Answer 10

Rocket immunoelectrophoresis

Question 11

Which of the following immunoelectrophoresis is for determination of gammopathies in blood serum:

Answer 11

Classical immunoelectrophoresis

Question 12

In a direct ELISA for testing of antibody, the intensity of colour measured after adding the substrate in the final step is:

Answer 12

Inversely proportional to the concentration of antibody in the pati ent’s
serum