Multiple Choice
In the context of phosphorylation, what is a kinase?
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8. Respiration
Types of Phosphorylation
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Which of the following correctly describes phosphorylation of a protein?
A
Addition of a phosphate group to a protein, often altering its function
B
Addition of a methyl group to a protein, often altering its function
C
Removal of a phosphate group from a protein, often altering its function
D
Addition of an acetyl group to a protein, often altering its function
Verified step by step guidance1
Understand the concept of phosphorylation: Phosphorylation is a biochemical process that involves the addition of a phosphate group (PO₄³⁻) to a protein or other organic molecule. This process is crucial in regulating the activity of proteins and can alter their function, activity, or location.
Identify the role of phosphate groups: Phosphate groups are negatively charged and can cause a conformational change in the protein structure, which can activate or deactivate the protein's function.
Differentiate between phosphorylation and other modifications: Phosphorylation specifically involves the addition of a phosphate group, whereas other modifications like methylation involve the addition of a methyl group (CH₃), and acetylation involves the addition of an acetyl group (CH₃CO).
Eliminate incorrect options: The options involving the addition of a methyl group, removal of a phosphate group, or addition of an acetyl group do not describe phosphorylation.
Select the correct description: The correct description of phosphorylation is the addition of a phosphate group to a protein, often altering its function.
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