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Signal transduction pathways

Biology • Cell Communication • Knowledge-Based • 1 questions

Signal transduction pathways Knowledge-Based Download PDF

Biology · Cell Communication & the Cell Cycle · Biology · Cell Communication

1 Biology practice questions on Signal transduction pathways. Questions that assess core concepts and understanding.

Questions

  1. 1.

    In eukaryotic signal transduction pathways involving a phosphorylation cascade, which molecular event directly results in the activation of successive target enzymes?

    • A) The binding of extracellular hydrophilic ligands directly to intracellular nuclear receptors
    • B) The enzymatic transfer of a phosphate group from ATP to specific amino acid residues
    • C) The enzymatic degradation of cyclic AMP into 5'-AMP by phosphodiesterase
    • D) The removal of phosphate groups from phosphorylated proteins by protein phosphatases