Multiple Choice
Which of the following is a reversible form of post-translational modification which can activate or deactivate a protein depending on the protein which is being modified?
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15. Gene Expression
Post-Translational Modification
Multiple Choice
Post-translational modifications of proteins can affect which of the following aspects of protein function?
A
RNA transcription
B
DNA replication
C
Lipid synthesis
D
Protein folding and stability
Verified step by step guidance1
Understand the concept of post-translational modifications (PTMs): These are chemical changes to a protein after it has been synthesized. Common PTMs include phosphorylation, glycosylation, ubiquitination, and acetylation.
Recognize the role of PTMs in protein function: PTMs can alter the protein's activity, interactions, localization, and stability, which are crucial for its proper function.
Identify how PTMs affect protein folding: PTMs can influence the folding process by adding chemical groups that change the protein's structure, potentially stabilizing or destabilizing it.
Consider the impact on protein stability: PTMs can protect proteins from degradation or mark them for destruction, thus affecting their lifespan and function within the cell.
Conclude that PTMs primarily affect protein folding and stability, rather than processes like RNA transcription, DNA replication, or lipid synthesis, which are not directly related to protein modifications.
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