#Question id: 1258
#Unit 4. Cell Communication and Cell Signaling
Following statements are regarding to the desensitization mechanism of GPCR.
A. Several residues in the cytosolic domain of the β-adrenergic receptor are phosphorylated by the enzyme rhodopsin kinase.
B. β-Arrestin binds to specific phosphorylated tyrosine residues in the C-terminal segment of G protein–coupled receptors (GPCRs).
C. Clathrin and AP2, two other proteins bound by β-arrestin, promote endocytosis of the receptor.
D. β-Arrestin also functions in transducing signals from activated receptors by binding to and activating several cytosolic protein kinases like Src activates the MAP kinase pathway, leading to phosphorylation of key transcription factor.
Which of the following combination is incorrect?
#Question id: 19090
#Unit 6. System Physiology – Plant
#Question id: 953
#Unit 1. Molecules and their Interaction Relevant to Biology
The degradation of arginine, histidine and proline all lead to the product ________.
#Question id: 4375
#Unit 3. Fundamental Processes
Protein X is found to bind to a certain geneʹs promoter only when substance A is not present. The gene can be transcribed in the presence of both X and A. It is not transcribed in the presence of X alone. Protein X is a/an __. Substance A is a/an __.
#Question id: 18794
#Unit 13. Methods in Biology