g Identify the statement that accurately describe receptor tyrosine kinases. A ligand binds to the intracellular domain of the protein. GTPase activity is required for autophosphorylation. The intracellular domains has kinase domains. They are called tyrosine kinases because they contain multiple tyrosines in the transmembrane helices. There are no transmembrane domains in receptor tyrosine kinases.

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.