Which of the following statements about Rho proteins is NOT TRUE?
Answer
a. They regulate cell proliferation through interacting with Ras pathway.
b. They control the assembly and organization of the actin cytoskeleton.
c. They are small GTPases and function as the molecular switches to control the signal transduction pathway.
d. They are required to maintain focal adhesions in attached cells, not required for the function of cadherin-based adherens junctions.


Which of the following statements about nuclear receptors is TRUE?
Answer
a. Nuclear receptors can only be activated through ligand binding
b. Nuclear receptors are cell surface receptors
c. Nuclear receptors can be activated through phosphorylation
d. Nuclear receptors only reside in nucleus



Which of the following statements about cadherins is TRUE
Answer
a. Cadherins mediate Ca2+-dependent homophilic cell-cell interaction
b. Cadherins mediate Ca2+-dependent heterophilic cell-cell interaction
c. Cadherins mediate Ca2+-independent homophilic cell-cell interaction
d. Cadherins mediate Ca2+-independent heterophilic cell-cell interaction



Which of the following statements about selectins is TRUE?
Answer
a. Selectins mediate Ca2+-independent heterophilic cell-cell interaction
b. Selectins mediate Ca2+-dependent heterophilic cell-cell interaction
c. Selectins mediate Ca2+-dependent homophilic cell-cell interaction
d. Selectins mediate Ca2+-independent homophilic cell-cell interaction