Multiple Choice
In the context of cell signaling, what does it mean to say that a signal is transduced?
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10. Cell Signaling
Introduction to Cell Signaling
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What role do phosphatases play in signal transduction pathways?
A
They deactivate proteins by removing phosphate groups.
B
They synthesize second messengers to amplify the signal.
C
They activate proteins by adding phosphate groups.
D
They transport signaling molecules across the cell membrane.
Verified step by step guidance1
Understand the role of phosphatases in cellular processes: Phosphatases are enzymes that remove phosphate groups from proteins, a process known as dephosphorylation.
Recognize the context of signal transduction pathways: These pathways involve a series of molecular events that lead to a cellular response, often initiated by a signaling molecule binding to a receptor.
Differentiate between kinases and phosphatases: Kinases add phosphate groups to proteins (phosphorylation), often activating them, while phosphatases remove these groups, typically deactivating the proteins.
Identify the specific function of phosphatases in signal transduction: By removing phosphate groups, phosphatases deactivate proteins, thereby turning off or modulating the signal transduction pathway.
Conclude the role of phosphatases: In the context of the given options, phosphatases deactivate proteins by removing phosphate groups, which is crucial for regulating the activity of signaling pathways.
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