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WorksheetsGlycogenesis and Glycogenolysis Quiz
Total questions: 20
Worksheet time: 10mins
Which enzyme is responsible for initiating glycogenesis?
Glycogen phosphorylase
Glycogenin
Glycogen synthase
Hexokinase
Which molecule donates glucose units in glycogenesis?
Glucose-6-phosphate
UDP-glucose
Fructose-1-phosphate
Glucose-1-phosphate
Which enzyme introduces branches in glycogen?
Branching enzyme
Debranching enzyme
Glycogen synthase
Glycogen phosphorylase
Which enzyme breaks α-1,4 glycosidic bonds in glycogenolysis?
Glycogen synthase
Glycogen phosphorylase
Branching enzyme
Glucokinase
Which hormone activates glycogenolysis?
Insulin
Glucagon
Somatostatin
Calcitonin
Which second messenger mediates glycogen phosphorylase activation?
IP3
cAMP
cGMP
DAG
What is the function of 2,3-BPG in RBCs?
Inhibits glycolysis
Binds hemoglobin to increase O2 affinity
Enhances oxygen release from hemoglobin
Acts as buffer
The Rapoport-Luebering cycle bypasses which enzyme of glycolysis?
Hexokinase
Phosphofructokinase
Phosphoglycerate kinase
Pyruvate kinase
Which of the following is an epimer of glucose?
Ribose
Fructose
Galactose
Deoxyribose
Epimers differ in configuration around:
All carbon atoms
Only at the aldehyde group
Only at one specific carbon atom
More than one carbon atom
Mutarotation refers to:
Change in color
Change in optical rotation
Change in temperature
Change in mass
Which form of glucose is more stable in solution?
α-D-glucose
β-D-glucose
Linear glucose
D-glucose
Oxidation of glucose at C6 gives:
Gluconic acid
Glucuronic acid
Sorbitol
Lactose
Reduction of glucose forms:
Fructose
Mannose
Galactose
Sorbitol
Which of the following is a reducing sugar?
Sucrose
Trehalose
Lactose
All are non-reducing
Which disaccharide is non-reducing?
Lactose
Maltose
Isomaltose
Sucrose
How many enzymes make up the PDH complex?
1
2
3
5
Which coenzyme is NOT involved in the PDH complex?
TPP
Biotin
NAD+
FAD
The PDH complex converts pyruvate into:
Lactate
Ethanol
Acetyl-CoA
Oxaloacetate
Which inhibits PDH complex?
Calcium
NAD+
NADH
AMP
