The information from a signal molecule present outside the cell elicits intercellular response when the G protein coupled receptors interact with the wide variety of molecules on the outer surface of the cells.
G Proteins are the specialized proteins having the ability to bind GTP and GDP and is of three units called Alpha, Beta and Gamma subunits which together formed G proteins.
When G protein is activated it will bind GTP and each receptor binds in lock and key method and binding result into conformational change which will trigger a complex chain of events influencing different cell function.
Features exhibited by Signal Transduction System are:
1. Specificity- Signal molecules fits binding site on its complementary receptor. Other signal do not fit
2. Amplification- When enzymes activates enzymes, the number of affected molecules increases.
3. Desensitization- Receptor activation triggers a feedback circuit that shuts off the receptor or removes it from the cell surface.
4. Integration - When two signals have opposite effects on a metabolic characteristics outcome results from the integrated input from both the receptor.
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I think it is C not 100% sure though
Usually form superficial skin infections only A. Bacteria
For the answer to the question above, <span>Lipid Rafts are subdomains of the plasma membrane it contains high concentrations of cholesterol and glycosphingolipids. It exists as distinct liquid-ordered regions of the membrane that are resistant to extraction with non-ionic detergents.
So the statement above is <u>"NOT TRUE OR FALSE" </u>
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Im not so sure about this answer
