Cell Signalling and Transduction Which of the following is true about a hydrophilic signaling molecule? It might trigger a signal cascade that causes some effect in a cell It is a steroid Since it can enter the cell, it directly affects some specific cell process Its receptor is located in the cytosol of the target cell It might trigger a signal cascade that causes some effect in a cell It is a steroid Since it can enter the cell, it directly affects some specific cell process Its receptor is located in the cytosol of the target cell ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Which of the following statements about G proteins is false? They bind to and are regulated by guanine nucleotides They must be active before the cell can make needed cAMP They are involved in signal cascades They become activated when bound to GDP They bind to and are regulated by guanine nucleotides They must be active before the cell can make needed cAMP They are involved in signal cascades They become activated when bound to GDP ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction In terms of cell communication, what do bacterial pathogens such as cholera and anthrax have in common? They destroy the receptors for key signaling molecules They block the normal functioning of signal transduction mechanisms They alter the chemical structure of key signaling molecules They prevent the production of key signaling molecules They destroy the receptors for key signaling molecules They block the normal functioning of signal transduction mechanisms They alter the chemical structure of key signaling molecules They prevent the production of key signaling molecules ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Simple nerve reflexes use signaling molecules called G proteins neurotransmitters nitric oxides proteases G proteins neurotransmitters nitric oxides proteases ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction The binding of ligands to many G-proteins linked receptors leads to shortlived increase in the concentration of certain intracellular signaling molecules called second messenger decrease in the concentration of certain intracellular signaling molecules called second messenger decrease in the concentration of certain extracellular signaling molecules called first messenger increase in the concentration of certain extracellular signaling molecules called first messenger increase in the concentration of certain intracellular signaling molecules called second messenger decrease in the concentration of certain intracellular signaling molecules called second messenger decrease in the concentration of certain extracellular signaling molecules called first messenger increase in the concentration of certain extracellular signaling molecules called first messenger ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Which of the following is not a type of signaling molecule? Thyroxin Testosterone Insulin Adenylate cyclase Thyroxin Testosterone Insulin Adenylate cyclase ANSWER DOWNLOAD EXAMIANS APP
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