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One indication of the relative importance of various ATP-producing pathways is the Vmax of certain enzymes of these pathways. The values of Vmax of several enzymes from the pectoral muscles (chest muscles used for flying) of pigeon and pheasant are listed below.  *table a. Discuss the relative importance of glycogen metabolism and fat metabolism in generating ATP in the pectoral muscles of these birds. b. Compare oxygen consumption in the two birds. c. Judging from the data in the table, which bird is the long-distance flyer? Justify your answer. d. Why were these enzymes selected for comparison? Would the activities of triose phosphate isomerase and malate dehydrogenase be equally good bases for comparison? Explain.

One indication of the relative importance of various ATP-producing pathways is the Vmax of certain enzymes of these pathways. The values of Vmax of several enzymes from the pectoral muscles (chest muscles used for flying) of pigeon and pheasant are listed below.  *table a. Discuss the relative importance of glycogen metabolism and fat metabolism in generating ATP in the pectoral muscles of these birds. b. Compare oxygen consumption in the two birds. c. Judging from the data in the table, which bird is the long-distance flyer? Justify your answer. d. Why were these enzymes selected for comparison? Would the activities of triose phosphate isomerase and malate dehydrogenase be equally good bases for comparison? Explain.

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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One indication of the relative importance of various ATP-producing pathways is the Vmax of certain
enzymes of these pathways. The values of Vmax of several enzymes from the pectoral muscles (chest
muscles used for flying) of pigeon and pheasant are listed below. 

*table

a. Discuss the relative importance of glycogen metabolism and fat metabolism in generating ATP in the
pectoral muscles of these birds.
b. Compare oxygen consumption in the two birds.
c. Judging from the data in the table, which bird is the long-distance flyer? Justify your answer.
d. Why were these enzymes selected for comparison? Would the activities of triose phosphate isomerase
and malate dehydrogenase be equally good bases for comparison? Explain. 

 

 

3. One indication of the relative importance of various ATP-producing pathways is the Vmax of certain enzymes of these pathways. The values of Vmax of several enzymes from the pectoral muscles (chest muscles used for flying) of pigeon and pheasant are listed below. Vmax (umol substrate/min/g tissue) Pigeon Enzyme Pheasant Hexokinase 3.0 2.3 18.0 24.0 Glycogen phosphorylase Phosphofructokinase-1 Citrate synthase Triacylglycerol lipase a. Discuss the relative importance of glycogen metabolism and fat metabolism in generating ATP in the pectoral muscles of these birds. b. Compare oxygen consumption in the two birds. c. Judging from the data in the table, which bird is the long-distance flyer? Justify your answer. d. Why were these enzymes selected for comparison? Would the activities of triose phosphate isomerase and malate dehydrogenase be equally good bases for comparison? Explain. 120.0 143.0 100.0 15.0 0.07 0.01
Transcribed Image Text:3. One indication of the relative importance of various ATP-producing pathways is the Vmax of certain enzymes of these pathways. The values of Vmax of several enzymes from the pectoral muscles (chest muscles used for flying) of pigeon and pheasant are listed below. Vmax (umol substrate/min/g tissue) Pigeon Enzyme Pheasant Hexokinase 3.0 2.3 18.0 24.0 Glycogen phosphorylase Phosphofructokinase-1 Citrate synthase Triacylglycerol lipase a. Discuss the relative importance of glycogen metabolism and fat metabolism in generating ATP in the pectoral muscles of these birds. b. Compare oxygen consumption in the two birds. c. Judging from the data in the table, which bird is the long-distance flyer? Justify your answer. d. Why were these enzymes selected for comparison? Would the activities of triose phosphate isomerase and malate dehydrogenase be equally good bases for comparison? Explain. 120.0 143.0 100.0 15.0 0.07 0.01
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