Signal Transduction

AP Biology· difficulty 3/5

A phosphorylation cascade involves

A
$Replication of ATP molecules through enzymatic cleavage steps$
B
$Hydrolysis of membrane phospholipids by sequential lipases$
C
$Direct phosphorylation of DNA bases by membrane receptors$
D
$Successive activation of protein kinases that each phosphorylate the next$
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Explanation

Each kinase activates the next, providing amplification, switching behavior, and integration of multiple signals.

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