6. L-Iduronic acid is to dermatan sulfate as D-galactose is to a. heparin b. hya

Question

6. L-Iduronic acid is to dermatan sulfate as D-galactose is to a. heparin b. hyaluronic acid c. heparan sulfate d. chondroitin sulfate e. Amylose 7. Which of the following enzymes has two enzymatic activities? a. glucose oxidase b. hexokinase c. phosphoglucomutase d. glucose-6-phosphatase e. beta-Amylase 8. Which of the following is an exoglycosidase? a. alpha-Amylase b. beta-Amylase c. Phosphofructokinase_1 (PFK_1) d. Phosphofructokinase_2 (PFK_2) e. None of the above is correct. 9. Cellular levels of fructose-2. 6-bisphosphate (F-2, 6-BP) are controlled by which enzyme or enzymes? a. Fructokinase and Fructose-2, 6-bisphosphatase b. Fructose-2, 6-bisphosphatase (PFK-2) c. PFK-2 and PFK-1 d. PFK-1 and Fructose-1, 6-bisphosphatase e. PFK-2 and fructokinase. 10. Which of the following is an important reason to phosphorylate glucose in the first step of glycolysis? a. The free energy released during phosphorylation is important in getting the pathway started. b. The phosphate in glucose-6-phosphate is negatively charged and cannot be transported out of the cell. c. The concentration of free glucose in the cell is low, and phosphorylation favors influx of glucose. d. Phosphorylation keeps glucose out of the cell. e. Regulatory control can be imposed only at a reaction not at equilibrium. 11. The step that commits glucose to glycolysis is catalyzed by a. pyruvate kinase b. phosphoglucoisomerase c. phosphofructokinase (PFK-1) d. glucokinase e. fructose-1.6-bisphosphate aldolase.

Explanation / Answer

6.E

Galactose polymerise to Amylose same as L-iduronic acid polymerise to dermaan sulphate

7. D

Glucose 6-phosphatase is an enzyme that hydrolyzes glucose-6-phosphate, resulting in the creation of a phosphate group and free glucose. This catalysis completes the final step in gluconeogenesis and glycogenolysis and therefore plays a key role in the homeostatic regulation of blood glucose levels.

8.E

Exoglycosidases that can be used to guide the precise determination of glycan structures. like galactosidase

9.B fructose 2,6 Bis phosphate

Which is stimulated by high level of fructose which is inhibitory and regulatory component for fructose 1,6 Bis phosphate

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