Cell Signalling and Transduction A signal cascade induced by adrenaline or thyroxine results in the activation of a sequence of enzymes needed for the cell effect All of these must begin with receipt of the signal molecule by a surface receptor involves the activation of a G protein results in the activation of a sequence of enzymes needed for the cell effect All of these must begin with receipt of the signal molecule by a surface receptor involves the activation of a G protein ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Which of the following statements about G proteins is false? They become activated when bound to GDP They must be active before the cell can make needed cAMP They bind to and are regulated by guanine nucleotides They are involved in signal cascades They become activated when bound to GDP They must be active before the cell can make needed cAMP They bind to and are regulated by guanine nucleotides They are involved in signal cascades ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Which of the following comes under the category of cell surface receptor? G protein linked receptors Ion-channel linked receptors Enzyme linked receptors All of these G protein linked receptors Ion-channel linked receptors Enzyme linked receptors All of these ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction In paracrine signaling, the signaling molecules affects only None of these both (a) and (b) target cells close to the cell from which it was secreted target cells distant from its site of synthesis in cells of an endocrine organ None of these both (a) and (b) target cells close to the cell from which it was secreted target cells distant from its site of synthesis in cells of an endocrine organ ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Two key organizing principles for large multicellular organisms are simple nerve reflexes and cell specialization cell specialization and communication between cells prokaryotic cell structure and cell specialization communication between cells and simple nerve reflexes simple nerve reflexes and cell specialization cell specialization and communication between cells prokaryotic cell structure and cell specialization communication between cells and simple nerve reflexes ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction The signaling molecules called steroid hormones bind to cell surface receptors to trigger chemical cascades are hydrophilic and so cannot penetrate the plasma membrane are made in one location of the body but have their effects some distance away never enter the blood of humans bind to cell surface receptors to trigger chemical cascades are hydrophilic and so cannot penetrate the plasma membrane are made in one location of the body but have their effects some distance away never enter the blood of humans ANSWER DOWNLOAD EXAMIANS APP
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