Glutamine Phosphoribosyl Pyrophosphate Amidotransferase Catalyzes Step 2 in the Biosynthesis

question 22

Multiple Choice

Glutamine phosphoribosyl pyrophosphate amidotransferase catalyzes step 2 in the biosynthesis of purines.Which of the following regarding the regulation of this enzyme is correct?

• A)It is accelerated by an input of ATP or GTP.
• B)It is sensitive to activation by azaserine.
• C)It is accelerated by an input of AMP or GMP.
• D)The G series of nucleotides as well as the adenine nucleotides act as competitive inhibitors.

---

Definitions:

Empiric

Based on observation or experience rather than theory or pure logic, often referring to medical treatment guidelines.

Metastasized

The process by which cancer cells spread from the location where they first formed to other parts of the body, forming new tumors.

Anesthetic

A medication that causes anesthesia.

Seizures

Sudden, uncontrolled electrical disturbances in the brain that can cause changes in behavior, movements, feelings, and levels of consciousness.