Multiple Choice
Which statement best describes the role of ATP in a living system?
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7. Energy and Metabolism
ATP
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ATP binding leads to which of the following actions in cellular processes?
A
Activation of protein kinases
B
Reduction of cellular respiration
C
Deactivation of ion channels
D
Inhibition of glycolysis
Verified step by step guidance1
Understand the role of ATP in cellular processes: ATP (adenosine triphosphate) is a molecule that provides energy for many cellular processes. It is often involved in signaling pathways and energy transfer.
Learn about protein kinases: Protein kinases are enzymes that modify other proteins by chemically adding phosphate groups to them (phosphorylation). This process is crucial for regulating the activity of proteins and signaling pathways.
Recognize the relationship between ATP and protein kinases: ATP is the source of the phosphate group that protein kinases transfer to target proteins. The binding of ATP to protein kinases is essential for their activation and function.
Consider the other options: Reduction of cellular respiration, deactivation of ion channels, and inhibition of glycolysis are processes that are not directly activated by ATP binding. Instead, ATP is often a product or regulator in these pathways.
Conclude that ATP binding is most directly associated with the activation of protein kinases, as it provides the necessary phosphate group for phosphorylation, a key step in activating these enzymes.
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