Which of the Following Represents a Protein Modification Which Changes

question 18

Multiple Choice

Which of the following represents a protein modification which changes enzyme activity in a non-reversible manner?

• A) Competitive inhibition
• B) Zymogen activation
• C) Phosphorylation of a serine residue of the protein
• D) coenzyme activation
• E) allosteric activation

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Definitions:

Mutation

A random error in gene replication that leads to a change.

Epigenetic Mark

Chemical modifications to DNA or histones that change gene activity without altering the DNA sequence, affecting how genes are expressed.

Free-floating Stress Hormones

Hormones like cortisol that circulate unbound in the bloodstream and can affect various parts of the body, often associated with the body's response to stress.

Natural Selection

The process by which organisms better adapted to their environment tend to survive and produce more offspring, driving evolution.