Signal transduction in development is often amplified by:
A)histone modification in chromosomes.
B)methylation of the target cell's DNA.
C)sequential phosphoryation of proteins in the cytoplasm.
D)opening and closing of nuclear pores.

Question

Quizplus · Accepted Answer

Sequential phosphorylation of proteins in the cytoplasm is a common mechanism for amplifying signal transduction during development. This allows for a small initial signal to be magnified as it is passed along a cascade of kinases and other signaling molecules, ultimately leading to a larger response in the target cell. Histone modification and DNA methylation are important for regulating gene expression, but they do not directly amplify signaling pathways. Opening and closing of nuclear pores are important for transporting molecules in and out of the nucleus, but they are not directly involved in signal transduction amplification.

Signal Transduction in Development Is Often Amplified By