#Question id: 1136
#Section 3: Genetics, Cellular and Molecular Biology
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
#Section 3: Genetics, Cellular and Molecular Biology
A loss-of-function mutation in PTEN phosphatase results in
a. increased cell proliferation.
b. decreased cell proliferation.
c. increased apoptosis.
d. decreased apoptosis.
#Question id: 1138
#Section 3: Genetics, Cellular and Molecular Biology
A loss-of-function mutation in Wnt would have a phenotype similar to a
a. gain-of-function mutation in GSK-3.
b. gain-of-function mutation in β-catenin.
c. loss-of-function mutation in GSK-3.
d. loss-of-function mutation in β-catenin.
#Question id: 1140
#Section 3: Genetics, Cellular and Molecular Biology
Cell sensitivity to an external signal is determined by:
#Question id: 1142
#Section 3: Genetics, Cellular and Molecular Biology
Of the components of a heterotrimeric G protein, which subunit(s) is(are) able to activate downstream responses?
#Question id: 1144
#Section 3: Genetics, Cellular and Molecular Biology
Which of the following is NOT a common intracellular second messenger?