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TLS Online TPP Program

#Question id: 16959

antigenic determinant is defined as a region of an antigen that makes contact with the antigen-combining region on an antibody. Which statement is true for Anti-isotype antibodies?

#Unit 4. Cell Communication and Cell Signaling
  1. Antigenic determinants that are allele specific—small differences in the constant region of light and heavy chains that vary among individuals.
  2. Antigenic determinants characteristic of a particular antigen combining site. Each antibody will have its own characteristic idiotypic determinants made up of residues from the heavy and light chains that contribute to the antigen-binding regions.
  3. Antigenic determinants specific to each heavy chain class
  4. Papain-generated fragment of antibodies consisting of the paired CH2CH3 (and, for IgM and IgE, CH4) domains
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TLS Online TPP Program

#Question id: 12211

#Unit 7. System Physiology – Animal

A 57-year-old man is admitted as an emergency for upper GI bleeding. Endoscopy reveals multiple ulcers in the duodenum. Serum gastrin levels are eight-fold higher compared to normal. Zollinger-Ellison syndrome (ZES, gastrinoma) is suspected. Administration of which of the following substances is useful in confirming the diagnosis?
TLS Online TPP Program

#Question id: 2280

#Unit 2. Cellular Organization

The smooth ER is especially abundant in cells that synthesize extensive amounts of
TLS Online TPP Program

#Question id: 13110

#Unit 13. Methods in Biology

With the help of DNA fingerprinting which can be used to determine paternity. There are three babies (Baby A, Baby B and Baby C) in a maternity ward, and three sets of confused and worried parents. (Father and Mother #1 are a couple, as are Father and Mother #2, and Father and Mother #3.) 
You do each PCR reaction on chromosome 15 and load each one into a separate well of an agarose gel, and then run the gel.
 

 
Match the babies up with their actual parents.
 
TLS Online TPP Program

#Question id: 5222

#Unit 11. Evolution and Behavior

 When does exon shuffling occur?
TLS Online TPP Program

#Question id: 14969

#Unit 2. Cellular Organization

 A new drug is developed that targets and binds to the lipid A portion of LPS from Gram negative bacterial cells. This drug shows a high degree of activity and binding in a test tube setting against purified lipid A. Based on this information,