1. From the following list, choose one enzyme type that fits each description be

Question

1. From the following list, choose one enzyme type that fits each description below: oxidoreductase, transferase, hydrolase, lyase, isomerase, ligase.

_____________________ glucose-6-phosphate à glucose + phosphate

_____________________ dihydroxyacetonephosphate (DHAP) à glyceraldehyde-3-P (GAP)

_____________________ Protein kinase A

2. List three ways in which fatty acid degradation and fatty acid synthesis differ.

3. Which of the following compounds are glucogenic? Circle every compound that is glucogenic, and put an X through compounds that are not.

ketone bodies             Odd chain fatty acid                lysine Even chain fatty acid              alanine             glycerol

4.Put these intermediates of cholesterol synthesis in order, and circle the one that is formed in the regulated step: mevalonate, acetyl CoA, squalene.

5. Circle the one letter abbreviation of the THREE amino acids that are major carriers of nitrogen from peripheral tissue to the liver. If you circle more than three, you will get zero points. G       R       Q       A       D       E   

6. What is the pH of an acetate/acetic acid solution (pKa= 4.7) in which acetic acid is 80% in its deprotonated form?

Explanation / Answer

1. a. transfersase   glucose-6-phosphate à glucose + phosphotransferase

Explanation: There is transfer of phosphate to the glucose molecule.

b. _isomerase dihydroxyacetonephosphate (DHAP) à glyceraldehyde-3-P (GAP)

Explanation: There is isomerisation between dihydroxyacetonephosphate (DHAP) and glyceraldehyde-3-P (GAP)

c. transferase Protein kinase A

Explanation: There is transfer of phosphate group.

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