Question

QUESTION 1

1. What is a heterophile antigen?

   	a.	an antigen homospecific to only one antibody.
   	b.	an antigen that has been modified to bind to more than one antibody.
   	c.	an antigen found only on one etiological agent.
   	d.	an antigen common to more than one species and whose distribution is unrelated to its phylogenetic distribution.

1 points   

QUESTION 2

1. What is an antigen?

   		a protein synthesized and secreted by T lymphocytes (T cells).
   		All bacterial cells are antigens.
   		Macromolecules composed of proteins, polysaccharides, lipids and combinations there of.
   		Molecules surrounded by lipid membranes.

1 points   

QUESTION 3

1. What is an agglutination reaction (what are agglutinins)?

   	a.	antibodies that produce precipitation of soluble antigens.
   	b.	antibodies that produce agglutination. a reaction that occurs when bacterial cells or other insoluble particles are visibly clumped.
   	c.	antibodies that bind with their antigen along with complement proteins found in the blood serum.
   	d.	antibodies that respond to toxins.

1 points   

QUESTION 4

1. What serological test will you be running in the procedure for exercise 38. ?

   	a.	Latex agglutination. We are testing two unknown gram negative rods isolated on Chocolate agar.
   	b.	Latex agglutination. We are testing E. coli for O and H antigens.
   	c.	Latex agglutination. We are testing a patients blood serum for antibodies.
   	d.	Latex agglutination. We are testing two unknown gram positive, catalase positive cocci on Blood agar labeled A and B.

1 points   

QUESTION 5

1. What is latex agglutination?

   	a.	A serological test where an antibody has been conjugated to a bacterial cell which interacts with the antigen.
   	b.	A serological test where an antibody has been conjugated to an enzyme that reacts with a substrate after coming in contact with it.
   	c.	A serological test where an antibody has been conjugated to a latex particle in order to enhance the visibility of the agglutination.
   	d.	When the technician inadvertently allows their latex gloves to interfere with the antigen/antibody interaction.

Answer 1

1 D an antigen common to more than one species and whose distribution is unrelated to its phylogenetic distribution.

2 C Macromolecules composed of proteins, polysaccharides, lipids and combinations there of

3 C antibodies that bind with their antigen along with complement proteins found in the blood serum.

4 For this question mentioned exercise 38 is not attached

5 D When the technician inadvertently allows their latex gloves to interfere with the antigen/antibody interaction.