1) In the table below, which of the following is a correct pairing of an enzyme,

Question

1) In the table below, which of the following is a correct pairing of an enzyme, covalent modification and level of activity in the FED state (ratio of insulin to glucagon is >1)?

a) 1

b) 2

c) 3

d) 4

2) Which of the following statements is consistant with protien catabolism in the fasted state?

a) the conversion of alpha-ketogluterate will be favored in the liver

b) Glycine will be used as a primary transporter for ammonia from the skeletal muscle to the liver

c) high levels of arginine will inhibit urea synthesis

d) glutaminase will be veryactive in the liver to free NH4 that will be used in the urea cycle

Explanation / Answer

1) the currect pair will be

phosophofructokinase undergoes dephosphorylation and phosphorylate fructose-6-phosphate during glycolysis

2) during fasted state the body undergoes lack of glucose which results in drop of insulin level and increase in glucgaon secreation.

Muscles start using amino acid as fuel during starvation

The liver starts forming ketone bodies, which is used as source of energy in brain and heart

During fasting :

(C) high levels of arginine will inhibit urea synthesis

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