Multiple Choice
Which of the following is a post-translational modification of a polypeptide?
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15. Gene Expression
Post-Translational Modification
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Which of the following is an example of post-translational modification?
A
DNA replication
B
Transcription initiation
C
RNA splicing
D
Phosphorylation
Verified step by step guidance1
Understand the concept of post-translational modification: It refers to the chemical changes that proteins undergo after translation, which is the process of synthesizing proteins from mRNA.
Identify the options given: DNA replication, transcription initiation, RNA splicing, and phosphorylation.
Recognize that DNA replication is the process of copying DNA, transcription initiation is the beginning of mRNA synthesis, and RNA splicing is the modification of RNA before translation.
Phosphorylation is a common post-translational modification where a phosphate group is added to a protein, altering its function or activity.
Conclude that phosphorylation is the correct example of post-translational modification among the given options.
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