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TLS Online TPP Program

#Question id: 10965

Which of the following is a TRUE statement?

#Unit 7. System Physiology – Animal
  1. In a transfusion reaction, there is agglutination of the recipient blood
  2. Shutdown of the kidneys following a transfusion reaction occurs slowly
  3. Blood transfusion of Rh+ blood into any Rh− recipient will result in an immediate transfusion reaction
  4. A person with type AB blood is considered to be a universal recipient
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TLS Online TPP Program

#Question id: 1231

#Unit 4. Cell Communication and Cell Signaling

Arrange the following events in the proper order in which they occur during transduction of the TGFβ signal:

a. association of Smad3 and Smad4  

b. phosphorylation of TGFβ receptor I by TGFβ receptor II            

c. phosphorylation of Smad3 by TGFβ receptor I     

d. nuclear import of Smad3   

e. binding of TGFβ to TGFβ receptor II  
TLS Online TPP Program

#Question id: 2514

#Unit 2. Cellular Organization

In what way are intermediate filaments similar to both microtubules and microfilaments?
TLS Online TPP Program

#Question id: 393

#Unit 1. Molecules and their Interaction Relevant to Biology

Carbon dioxide (CO2) is readily soluble in water, according to the equation CO2 + H2O ↔ H2CO3. Carbonic acid (H2CO3) is a weak acid. If CO2 is bubbled into a beaker containing pure, freshly distilled water, which of the following graphs correctly describes the results?
TLS Online TPP Program

#Question id: 10451

#Unit 6. System Physiology – Plant

Which induction is responsible for “uncages” the kinase domain of phototropin and leads to autophosphorylation
TLS Online TPP Program

#Question id: 15658

#Unit 13. Methods in Biology

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium.
Next, you isolate a third mutant, MelC–, which gives constitutive melibiase expression. The MelC– mutation is closely linked to Mel1 and MelB–. Genetic tests of the MelC– mutation yield the following:
 
As above, classify the MelC– mutation in terms of its basic genetic properties and explain how you arrived at your conclusions.