Cell Signalling and Transduction Which of the following statements about G proteins is false? They bind to and are regulated by guanine nucleotides They are involved in signal cascades They must be active before the cell can make needed cAMP They become activated when bound to GDP They bind to and are regulated by guanine nucleotides They are involved in signal cascades They must be active before the cell can make needed cAMP They become activated when bound to GDP ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Why is it that inhaling nitric oxide reduces blood pressure only in the lung tissue and not elsewhere in the body*? None of these Because nitric oxide cannot cross cell membranes and enter the blood Because other body tissues use a different signaling molecule Because nitric oxide breaks down quickly and thus cannot travel far None of these Because nitric oxide cannot cross cell membranes and enter the blood Because other body tissues use a different signaling molecule Because nitric oxide breaks down quickly and thus cannot travel far ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Two key organizing principles for large multicellular organisms are communication between cells and simple nerve reflexes simple nerve reflexes and cell specialization prokaryotic cell structure and cell specialization cell specialization and communication between cells communication between cells and simple nerve reflexes simple nerve reflexes and cell specialization prokaryotic cell structure and cell specialization cell specialization and communication between cells ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction The hormone or ligand can be considered as none of these first messenger both (a) and (b) second messenger none of these first messenger both (a) and (b) second messenger ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction A cell is known to respond to a particular signaling molecule. Which of the following must be true of this cell? It contains the receptor for the signaling molecule It is in the heart muscle It is also the site of production for the signaling molecule It is incapable of signal transduction It contains the receptor for the signaling molecule It is in the heart muscle It is also the site of production for the signaling molecule It is incapable of signal transduction ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Self-phosphorylation is an excellent mechanism for triggering specific catalytic function of the proteins involved in signal cascades because it makes the receptor more likely to capture the signaling, molecule None of these changes the shape and thus the enzymatic activity of the proteins involved allows hydrophilic signaling molecules to cross the plasma membrane makes the receptor more likely to capture the signaling, molecule None of these changes the shape and thus the enzymatic activity of the proteins involved allows hydrophilic signaling molecules to cross the plasma membrane ANSWER DOWNLOAD EXAMIANS APP
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