The enzymes glucokinase in the liver and hexokinase in the brain both catalyse the phosphorylation of glucose:
glucose + ATP $ \to $ glucose phosphate + ADP
The activity of each enzyme was measured at different concentrations of glucose. The graph shows the results.
What describes the different activities of the two enzymes?
1 )
Both enzymes hold glucose and ATP molecules together at the active site.
2 )
Glucokinase becomes saturated with glucose at a lower concentration of glucose than hexokinase.
3 )
Glucokinase phosphorylates more molecules of glucose per minute.
The affinity of hexokinase for glucose is greater than that of glucokinase.
تحلیل ویدئویی تست
تحلیل ویدئویی برای این تست ثبت نشده است!
پرسش و پاسخ های مشابه
سوال کنید یا به سوالات دیگران پاسخ دهید ...