Open Question
Steroid hormones, like most lipid-soluble signaling molecules, are processed directly. How does the absence of a signal transduction cascade in the processing of steroid hormones affect (b) signal regulation?
10. Cell Signaling
Signal Amplification
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What role do phosphatases play in signal transduction pathways?
a) They phosphorylate proteins involved in signal transduction or cellular response.
b) They activate protein kinases by phosphorylation.
c) They amplify the signal molecule.
d) They regulate the function of proteins involved in signal transduction pathways or cellular response.
A
They phosphorylate proteins involved in signal transduction or cellular response.
B
They activate protein kinases by phosphorylation.
C
They amplify the signal molecule.
D
They regulate the function of proteins involved in signal transduction pathways or cellular response.
Verified step by step guidance1
Understand the role of phosphatases in cellular processes: Phosphatases are enzymes that remove phosphate groups from proteins, which is a crucial step in regulating protein function.
Recognize the importance of phosphorylation and dephosphorylation: Phosphorylation (addition of phosphate groups) and dephosphorylation (removal of phosphate groups) are key mechanisms in signal transduction pathways, affecting protein activity, interactions, and localization.
Identify the contrast between phosphatases and kinases: While kinases add phosphate groups to proteins, phosphatases remove them, thus they have opposite roles in modulating protein activity.
Explore how phosphatases contribute to signal transduction: By dephosphorylating proteins, phosphatases can deactivate or alter the function of proteins, thereby regulating the signal transduction pathway and cellular responses.
Consider the regulatory function of phosphatases: Phosphatases play a critical role in turning off signals or resetting pathways, ensuring that cellular responses are appropriately controlled and terminated when necessary.
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Signal Amplification practice set
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