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AAMC Sample Test: Bio exam with 100% correct answers 2025
GTPase activating protein (GAP) catalyzes the conversion of GTP to GDP and inorganic phosphate. What class of enzymes does GAP belong to? 
a. transferase 
b. phosphatase 
c. kinase 
d. isomerase correct answersB: phosphatase 
 - hydrolase responsible for cleaving the phosphate bonds to remove a molecule of inorganic phosphate 
 
Arf1-COP undergoes retrograde transport. Proteins that are encapsulated in ARF1-COP derived vesicles are bound for the 
a. endoplasmic reticulum 
b. cellular membrane 
c...