Which of the following is a FALSE statement about adenylylation of Glutamine syn

Question

Which of the following is a FALSE statement about adenylylation of Glutamine synthetase? At high ammonia, a small amount of ATP is used to deactivate the enzyme, thus saving a large amount of ATP that would otherwise be required to data catalyze the synthesis of many molecules of glutamine. The process allows available ammonia/ammonium-ion to be used in place of a glutamine in biosynthetic reactions that otherwise require glutamine The extent of Pll uridylylation controls the extent of glutamine synthetase adenylylation. High glutamine favors deadenylylation of GS AMP, the active form of this bacterial enzyme. In GS-AMP, the covalently bound AMP blocks substrate access to the active site of glutamine synthetase.

Explanation / Answer

Whenever there is high glutamine i.e. the product of the glutamine synthetase enzyme, it favours the low activity of the enzyme which is achieved by its adenylylation. So fourth option that high glutamine favours deadenylylation of GS-AMP is false.

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