Course

Cell Biology

Study Pack

Set 23 Signal Transduction Mechanisms Iimessengers And Receptors

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Question 1

(Multiple Choice)

Free
Previous experiments have not conclusively demonstrated XFF is the alien epinephrine,so you decide to investigate other XFF properties using radioactive XFF.Which of the following XFF behaviors confirm that XFF is similar to estrogen?

A)XFF binds only to the cell surface.
B)XFF diffuses into the cell cytoplasm.
C)XFF is internalized by receptor-mediated endocytosis.
D)Ryanodine blocks the interaction of XFF with cells.
E)Opioids block the interaction of XFF with cells.

Answer

Question 2

(Multiple Choice)

Free
Each of the following activates a receptor tyrosine kinase except

A)EGF.
B)PDGF.
C)TGFβ
D)FGF.
E)Insulin.

Answer

Question 3

(Multiple Choice)

Free
The interleukin-2 (IL-2)growth factor interacts with receptors on

A)embryonic cells.
B)cytotoxic T lymphocytes.
C)mesenchymal cells.
D)smooth muscle cells.
E)epithelial cells.

Answer