객관식
Which of the following would not be a reversible post-translational modification?
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7. Enzyme Inhibition and Regulation
Post Translational Modification
객관식
The addition or removal of phosphate groups allows cells to control the function of which of the following biomolecules?
A
Carbohydrates
B
Proteins
C
DNA
D
Fatty acids
검증된 단계별 안내1
Understand the concept of phosphorylation: Phosphorylation is the addition of a phosphate group (PO₄³⁻) to a molecule, typically mediated by enzymes such as kinases. Dephosphorylation is the removal of a phosphate group, often facilitated by phosphatases.
Recognize the role of phosphorylation in cellular regulation: Phosphorylation is a key mechanism for regulating the activity, function, and interactions of biomolecules, particularly proteins. It can activate or deactivate enzymes, alter protein structure, and influence signaling pathways.
Identify the biomolecules affected by phosphorylation: Proteins are the primary biomolecules regulated by phosphorylation. This process is crucial in signal transduction pathways, where protein kinases and phosphatases modulate cellular responses.
Eliminate other options: Carbohydrates, DNA, and fatty acids are not typically regulated by phosphorylation in the same way proteins are. While phosphorylation can occur in these molecules (e.g., phosphorylation of sugars in glycolysis or DNA during replication), it is not the primary mechanism for functional control.
Conclude that proteins are the correct answer: Based on the explanation above, proteins are the biomolecules whose function is most commonly controlled by the addition or removal of phosphate groups.
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