What are the critical role of kinases in human biology? Protein kinases are involved in many cellular signaling pathways and comprise one of the largest families of homologous proteins. They play an extensive role in signal transduction and regulation of the complex cellular processes necessary to maintain life. Overexpression and/or dysregulation of protein kinases lead to a variety of diseases, thus providing numerous targets for drug development.

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1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.