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Which of the following statements about glycogen breakdown is correct?

a) Glycogen phosphorylase splits off glucose from the reducing end of a glycogen chain.

b) Glucose-6-phosphatase is present in liver but not in muscle.

c) Glucose-6-phosphatase is present in muscle but not in liver.

d) Glycogen phosphorylase splits off glucose from the nonreducing end of a glycogen chain.

Which of the following statements about glycogen synthesis is correct?

a) Glycogen synthesis occurs at the reducing end of glycogen chains.

b) Phosphoglucomutase drives glycogen synthesis because the reaction has a large negative ΔG^0,.

c) Glycogen synthesis occurs when there is a high insulin to glucagon ratio

d) Glycogen synthesis occurs when there is a high glucagon to insulin ratio.

Which of the following statements about galactose is correct?

a) Galactose cannot be metabolised and remains in our blood after we consume milk.

b) Galactose is a glucose epimer that can be used as a substrate by the enzymes that use glucose as a substrate.

c) Galactose and fructose are isomers of glucose and can easily be interconverted.

d) Galactosaemia is a serious genetic disease that requires the removal of galactose from the diet of newborn infants.

Which of the following statements about the enzymes, glucokinase and/or hexokinase is correct?

a) Glucokinase has a high affinity for glucose.

b) Hexokinase has a high affinity for glucose.

c) Hexokinase has a higher K_mfor glucose than has glucokinase.

d) Glucokinase has a lower K_mfor glucose than has hexokinase.

Which of the following statements about circulating lipoproteins is correct?

a) Chylomicrons release cholesterol to adipose tissues.

b) VLDL release cholesterol to the liver.

c) Chylomicrons contain mainly dietary triacylglycerols in their core.

d) LDL contain mainly dietary triacylglycerols in their core.

Oxford University Press, Online Resource Centre, Chapter 10.