BIO330 Cellular Biochemistry Chapter 11: Glycogenesis

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What is the type of bond formed between glycogenin and the initial glucose unit?

β-1,4 glycosidic bond

non-glycosidic bond (correct)

α-1,6 glycosidic bond

α-1,4 glycosidic bond

What is the function of glycogen synthase in the chain extending activity of glycogenesis?

to break α-1,4 glycosidic bonds

to form a new branch

to cut the bond and transfer glucose residues from non-reducing end of a glycogen

to transfer glucose residue from UDP-glucose to the nonreducing end of an initially added glucose molecule (correct)

What is the result of the bond formation process between C1 of one glucose and C4 of another glucose?

Water is lost (correct)

Energy is released

No water is involved

Water is gained

What is the minimum number of glucose residues required for glycogen branching enzyme to act?

10 Signup and view all the answers

What type of bond is formed between a C1 and C4 which hydroxyl groups are pointing in opposite directions?

β – glycosidic bond Signup and view all the answers

What is the type of bond formed between glucose units in the chain extending activity of glycogenesis?

α-1,4 glycosidic bond Signup and view all the answers

What is the purpose of the phosphorylation of glucose in step 1 of glycogenesis?

To activate glucose for glycogen synthesis Signup and view all the answers

What happens once a third glucose unit has been added in the autoglycosylation reaction?

Autoglycosylation stops Signup and view all the answers

What is the role of phosphoglucomutase in step 2 of glycogenesis?

To catalyze the shift of phosphate group from C6 to C1 Signup and view all the answers

What is the function of pyrophosphatase in step 3 of glycogenesis?

To catalyze the exergonic breakdown of PPi Signup and view all the answers

What is the role of glycogenin in the synthesis of glycogen?

To serve as a base molecule for glycogen synthesis Signup and view all the answers

What is the maximum glycogen storage capacity of the liver?

100g Signup and view all the answers

What triggers the production of insulin during glycogenesis?

High blood glucose levels Signup and view all the answers

What is the non-reducing end of the glucose molecule?

Carbon 4 (C4) Signup and view all the answers

During which state does glycogenesis occur?

Fed state Signup and view all the answers

What is the number of carbons found in a glucose molecule?

6 Signup and view all the answers

BIO330 Cellular Biochemistry Chapter 11: Glycogenesis

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