Which of the following sequences is correct? a. binding of a signaling molecule to its receptor → g protein activation → phospholipase c activation → ip3 production → increase in cytoplasmic calcium concentrationb. binding of a growth factor to its receptor → phosphorylation cascade → activation of transcription factor → transcriptionc. binding of a signaling molecule to its receptor → g protein activation → adenylyl cyclase activation → camp production → protein phosphorylationd. diffusion of a signaling molecule across the plasma membrane → binding of the signaling molecule to its receptor → movement of the signaling molecule-receptor complex into the nucleus → transcriptione. all of the choices are correct.
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Ответ:
All of the choices are correct
Explanation: Signal transduction converts extracellular signals into intracellular signals and a signaling molecule (ligand/ first messenger) reaches its target cell and binds to a specific receptor, this in turn activates a signaling cascade involving intracellular enzymes and molecules (second messengers), which leads to a specific reaction. Through signal amplification, the number of signaling molecules is increased at every step of the signal cascade.
The receptor is a protein that receives signals, binds the ligand and then initiates an intracellular sequence. It is subdivided into Intracellular, cell surface and nuclear receptor
Ligand / First Messenger is a chemical messenger that binds to 1 receptor
The second messenger are small molecules and they transfer the intracellular response to an extracellular stimulus e.g cGMP
Ответ:
The mass percent of oxygen in sodium bicarbonate (NaHCO3) is 57.13% Oxygen.
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