Phosphorylated form of pyruvate kinase 

a. Strongly inhibited by ATP and alanine

b. Activated by AMP, F-1,6-BP

c. Inhibited by ATP & acetyl CoA

d. Covalent phosphorylation strongly inhibits pyruvate kinase

Which of the above statements are correct

TLS Online TPP Program

#Question id: 1184

#Unit 4. Cell Communication and Cell Signaling

The order of events in a signaling pathway can be determined by the analysis of mutants. Cells that express a mutant defective Raf protein cannot be stimulated to proliferate uncontrollably by constitutively active RasD (dominant active). This indicates:

TLS Online TPP Program

#Question id: 1185

#Unit 4. Cell Communication and Cell Signaling

How can multiple MAP kinase pathways be segregated when they share a common component, like a downstream kinase?

TLS Online TPP Program

#Question id: 1186

#Unit 4. Cell Communication and Cell Signaling

Which of the following explains why Ras is activated quickly by RTKs?

TLS Online TPP Program

#Question id: 1187

#Unit 4. Cell Communication and Cell Signaling

Which protein stabilizes an intermediate in the Ras GTP hydrolysis reactions?

TLS Online TPP Program

#Question id: 1188

#Unit 4. Cell Communication and Cell Signaling

Which of the following are enzyme pairs that catalyze opposite reactions?

TLS Online TPP Program

#Question id: 1189

#Unit 4. Cell Communication and Cell Signaling

Which of the following signaling pathway cannot be activated by cytokines?