KROK 1 2016 – Question 171 · KROK (Medicine) · Biological Chemistry
Pancreas is known as a mixed gland. Endocrine functions include production of insulin by beta cells. This hormone affects metabolism of carbohydrates. What is its effect on the activity of glycogen phosphorylase (GP) and glycogen synthase (GS)?
- A. It inhibits both GP and GS
- B. It does not affect the activity of GP and GS
- C. It activates both GP and GS
- D. It activates GP and inhibits GS
- E. It inhibits GP and activates GS
Hint
Insulin signals the fed state: decide whether the liver and muscle should be storing or releasing glucose, and how dephosphorylation would change each enzyme.
The answer, the explanation and a note on every option are available once you log in. The account is free: topic tests, a mock exam, mistake review and statistics.
More questions on Biological Chemistry
- Fructosuria is known to be connected with inherited deficiency of fructose 1-phosphate aldolase. What product of fructose metabolism will accumulate…
- Cholesterol content in blood serum of a 12-year-old boy is 25 mmol/l. Anamnesis states hereditary familial hypercholesterolemia caused by synthesis…
- Coenzyme A participates in numerous important metabolic reactions. It is a derivative of the following vitamin:
- When investigating human saliva it is necessary to assess its hydrolytic properties. What substance should be used as a substrate in the process?
- Protective function of saliva is based on several mechanisms, including the presence of enzyme that has bactericidal action and causes lysis of…
- A pregnant woman with several miscarriages in anamnesis is prescribed a therapy that includes vitamin preparations. What vitamin facilitates…