The absence of MHC class I, which is expressed by almost all normal cells, but is specifically down-regulated by some tumors and in response to some viral infections, it will undergo apoptosis by

TLS Online TPP Program

#Question id: 27070

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statements is correct regarding the stereochemistry of Thr, Ile 

1. Thr, Ile is special case because of two chiral center exist in L-Ile in 2R,3S and L-Thr in 2R,3S configuration 

2. Thr, Ile is special case because of two chiral center exist in D-Ile in 2R,3S and D-Thr in 2R,3S configuration 

3. Thr, Ile is special case because of two chiral center exist in L–Ile in 2S,3R and L–Thr in 2S,3R 

4. Thr, Ile is special case because of two chiral center exist in D–Ile in 2S,3R and D–Thr in 2S,3R

TLS Online TPP Program

#Question id: 1232

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following mutations might confer a competitive advantage to an athlete by raising his or her hematocrit?

a. excess production of erythropoietin                       

b. decreased production of erythropoietin

c. EpoR that cannot bind STAT5                  

d. EpoR that cannot bind SHP1

e. EpoR that cannot bind JAK2

TLS Online TPP Program

#Question id: 88

#Unit 1. Molecules and their Interaction Relevant to Biology

Anomers can be interconverted ________.

TLS Online TPP Program

#Question id: 27159

#Unit 1. Molecules and their Interaction Relevant to Biology

This event can cause a damage to the hypothalamus portal system

TLS Online TPP Program

#Question id: 294

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following pairs of amino acids would you predict to only participate in Van der Waals interactions in the three dimensional folding of a protein:

TLS Online TPP Program

#Question id: 27210

#Unit 1. Molecules and their Interaction Relevant to Biology

Charge on one mol of electron is approximately equal to