A protein is secreted by cells in your pancreas and travels to target cells in your liver via the blood stream. which of the following is/are true about this signal molecule?
a) It acts via a nuclear receptor
b)It acts via a cell surface receptor
c)It is an endocrine signal
d) a and c
e) b and c
Which of the following is/are features of molecular switches based on photo phosphorylation?
a) the target protein is active when bound to ATP but inactive when bound to ADP
b) Activation of the target protein requires the action of a protein kinase
c) Inactivation of the target protein is mediated by enzymatic activity of the target protein itself
d) a and c
e) a, b, and c
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