Unit 3 quiz

Question 1

Phosphoenolpyruvate (PEP) carboxykinase is responsible for converting oxaloacetate to phosphenolpyruvate. How does oxaloacetate get from the mitochondria to the cytosol?

Answer 1

It is converted into malate, transported out, then turned back into oxaloacetate.

Question 2

Glucose 6-phosphatase is responsible for what reaction?

Answer 2

Glucose-6-phosphate –> Glucose

Question 3

What is the main inhibitor of fructose 1,6 bisphosphatase

Answer 3

Fructose 2,6-bisphosphate and AMP

Question 4

Glucoagon/Epinephrine affect the fructose 1,6 bisphosphate –> fructose 6 phosphate reaction by inhibiting _______ which effectively turns on ____ and also turns off _____

Answer 4

PFK2; Fructose 1,6 bisphosphatase; PFK1

Question 5

Glycogen synthase catalyzes the reaction UDP-glucose –> glycogen and requires a branching enzyme in addition. Glycogen synthase makes _____ linkages, and the branching enzyme makes ____ linkages

Answer 5

Alpha-1,4; alpha-1,6

Question 6

What is the obligate pair in transamination reaction?

Answer 6

Alpha-ketoglutarate and glutamate

Question 7

The production of ammonia (and alpha-ketoglutarate) in the reaction catalyzed by glutamate dehydrogenase
is activated by ______ and _____

Answer 7

ADP and GDP

Question 8

The production of ammonia (and alpha-ketoglutarate) in the reaction catalyzed by glutamate dehydrogenase
is inactivated by ______ and _____

Answer 8

ATP and GTP