glycogen, gluconeogenesis, CAC

Which type of glycosidic bond is responsible for the branched structure of glycogen?

• α(1→4) bond

• β(1→4) bond

• α(1→6) bond

• β(1→6) bond

Which tissue type is the only one that stores glycogen in a form that can be made accessible to other organs?

• Muscle tissue

• Kidney tissue

• Adipose tissue

• Liver tissue

Which of the following correctly lists the four main steps of glycogenesis?

• Glucose phosphorylation, UDP-glucose formation, Glycogen elongation, Branching

• Glycogenolysis, UDP-glucose formation, Glycogen elongation, Dephosphorylation

• Glucose transport, Glycolysis, UDP-glucose formation, Branching

• Glucose phosphorylation, Glycolysis, Glycogenolysis, ATP production

Which of the following correctly pairs the energy states of glycogenesis and glycogenolysis, respectively?

• Exergonic; Endergonic

• Endergonic; Exergonic

• Endergonic; Endergonic

• Exergonic; Exergonic

Why is glucose-6-phosphate (G6P) not dephosphorylated in muscle cells during glycogenolysis?

• Muscle cells do not break down glycogen into glucose-6-phosphate.

• Muscle glycogen is used for muscle contraction, not blood glucose regulation.

• Dephosphorylation of G6P in muscle would waste ATP.

• Muscle cells store glycogen only for long-term energy storage.

Which of the following correctly lists the order of the 3 main steps of glycogenolysis?

• removal, debranching, isomerization

• debranching, isomerization, removal

• isomerization, removal, debranching

• removal, isomerization, debranching

When ATP levels are high, is glycogen phosphorylase active or inactivated?

• Active

• Inactivated

• Both active and inactivated

• None of the above

When ATP levels are high, is glycogen synthase active or inactivated?

• Active

• Inactivated

• Both active and inactivated

• None of the above

What are the three main substrates of gluconeogenesis?

• Glycogen, Pyruvate, Amino acids

• Glucose, Fructose, Sucrose

• Lactate, Glycerol, Amino acids

• Amino acids, Lactate, Acetyl-CoA

Which of the following enzymes are involved in gluconeogenesis that bypass the irreversible steps of glycolysis?

• Hexokinase, Phosphofructokinase, Pyruvate kinase, Aldolase

• Enolase, Phosphofructokinase, Aldolase, Triose phosphate isomerase

• Lactate dehydrogenase, Glycerol kinase, Glycogen phosphorylase, Isocitrate dehydrogenase

• Pyruvate carboxylase, Phosphoenolpyruvate carboxykinase, Fructose-1,6-bisphosphatase, Glucose-6-phosphatase