Clinically, the cell wall is important because it contributes to the ability of some species to cause disease and is the site of action of some antibiotics. In addition, the chemical composition of the cell wall is used 

#Question id: 1132

#Unit 4. Cell Communication and Cell Signaling

Which of the following become(s) active as a kinase when an activation lip residue is phosphorylated?

a. EpoR                       b. JAK             c. STAT           d. Ras              e. MAPK

#Question id: 1133

#Unit 4. Cell Communication and Cell Signaling

What tertiary structure characterizes all cytokines?

#Question id: 1134

#Unit 4. Cell Communication and Cell Signaling

Arrange the following proteins in the proper order in which they become activated in the MAPK signaling pathway:

a. MAP kinase                         b. MEK           c. Ras              d. Raf              e. RTK            

#Question id: 1135

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a direct substrate of MAP kinase?

a. TCF             b. SRF             c. SRE             d. p90RSK      e. CREB

#Question id: 1136

#Unit 4. Cell Communication and Cell Signaling

Which of the following signaling pathways can be activated by activation of receptor tyrosine kinases?

a. phospholipase Cγ                b. PI-3 kinase

c. MAP kinase                         d. none of the above

#Question id: 1137

#Unit 4. Cell Communication and Cell Signaling

A loss-of-function mutation in PTEN phosphatase results in

a. increased cell proliferation.            

b. decreased cell proliferation.

c. increased apoptosis.                                   

d. decreased apoptosis.