Kinases and Phosphatases Are Essential in the Cell Because They

question 59

Multiple Choice

Kinases and phosphatases are essential in the cell because they

• A)help turn proteins "on and off" through changes in phosphorylation status.
• B)are enzymes that destroy damaged proteins.
• C)sense short poly-A tails in mRNA as a signal to degrade the mRNA.
• D)destroy second messengers, thereby turning off a signal transduction pathway.
• E)all of the above

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