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Signal transduction occurs when an extracellular signaling molecule activates a cell surface receptor. In words, this receptor change intracellular molecules changes a response. There are two levels in this procedure: the signaling molecule activates a particular receptor protein on the cell membrane. A 2nd messenger transfers the signal into the cell and eliciting a physiological response. In either level the signal can be amplified. Whereas, one signalling molecule can cause several responses. Gene activations and metabolism alterations are instances of cellular responses to extracellular stimulation which requires signal transduction.
Contrast the reproduction of bacteria with that of frogs. Bacteria replicate asexually by splitting in two. Frogs reproduce sexually by producing sperm and eggs. One sperm and
Determination of vitamin B 12 Spectrophotometric determination of the characteristic ultraviolet absorption is suitable for the determination of pure vitamin B 12 or of pure
Use of micro-organisms to control insect pests, pathogens or weeds constitutes biological control, and the biological agents employed are called biocontrol agents. Micro-organis
Maintain nutrition Your responsibility as a nurse is to take care of nutrition and prevent the child from starvation. Breast feeding'should be continued during the diarrhoea e
Define Methods of Food Processing? Food is undeniably most vital to the survival of human beings. Hence, it must be processed using various scientific techniques. This is done
Define the Process of Feeding 0-6 Months Infant? The term exclusive breast feeding is used when all fluids, energy and nutrients are provided by breast milk, with the possible
Define Polyacrylamide gel electrophoresis (PAGE)? Acrylamide gel has the advantage over starch in that it is easier to prepare and is more inert, the pore size can be varied in
Will there be an opportunity to comment? In a supplemental notice accompanying the last rule package, EPA is soliciting additional information and public comment on issues fro
Q. What is factor VIII? What is the genetic disease in which this factor is absent? Factor VIII has the function of activating factor X that in its turn is necessary for the tr
which type of cleavage takes place in centrolecithal egg
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