Multiple Choice
Post-translational modifications of proteins can affect which of the following aspects of protein function?
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15. Gene Expression
Post-Translational Modification
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What does the process of post-translational modification refer to?
A
The transcription of DNA into RNA
B
The alteration of proteins after they have been synthesized
C
The synthesis of proteins from mRNA
D
The replication of DNA during cell division
Verified step by step guidance1
Understand that post-translational modification refers to changes made to proteins after they have been synthesized. This is distinct from transcription, translation, or DNA replication.
Recognize that proteins are synthesized during translation, where mRNA is used as a template to build a polypeptide chain.
After synthesis, proteins may undergo various modifications, such as phosphorylation, glycosylation, or cleavage, which can alter their function, activity, or location.
These modifications are crucial for the protein's final function and can affect how it interacts with other molecules within the cell.
Post-translational modifications are essential for the regulation of cellular processes and can play a role in signaling pathways, protein stability, and cellular localization.
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