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Which three reactions in glycolysis are tightly regulated? O hexokinase, phosphofructokinase, and pyruvate kinase O PFK, hexokinase, phosphoglucoisomerase O triose phosphatase, hexokinase, phosphoglucoisomerase none of the above

Which three reactions in glycolysis are tightly regulated? O hexokinase, phosphofructokinase, and pyruvate kinase O PFK, hexokinase, phosphoglucoisomerase O triose phosphatase, hexokinase, phosphoglucoisomerase none of the above

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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Which three reactions in glycolysis are tightly regulated? O hexokinase, phosphofructokinase, and pyruvate kinase O PFK, hexokinase, phosphoglucoisomerase triose phosphatase, hexokinase, phosphoglucoisomerase none of the above
Transcribed Image Text:Which three reactions in glycolysis are tightly regulated? O hexokinase, phosphofructokinase, and pyruvate kinase O PFK, hexokinase, phosphoglucoisomerase triose phosphatase, hexokinase, phosphoglucoisomerase none of the above
Use the following table for all questions in the problem set related to glycolysis: TABLE 18.1 Reactions and Thermodynamics of Glycolysis AG" AG Reaction Enzyme (k/mol) at 25°c (kJ/mol) Hexokinase Glucokinase a-D-Glucose + ATPt-= -16.7 850 -33.9* glucose-6-phosphate?- + ADP- + H* Glucose-6 phosphate²-=fructose-6-phosphate- Fructose-6-phosphate- + ATP-= fructose-1,6-bisphosphate- + ADP- + H* Fructose-1,6-bisphosphate dihydroxyacetone-P- + glyceraldehyde-3-P:- Dihydroxyacetone-P=glyceraldehyde-3-P- Glyceraldehyde-3-P- + P?- + NAD*= 1,3-bisphosphoglycerate- + NADH + H* 1,3-Bisphosphoglycerate + ADP- Phosphoglucoisomerase Phosphofructokinase +1.67 0.51 -2.92 -14.2 310 -18.8 Fructose bisphosphate aldolase +23.9 6.43 X 10-3 -0.23 Triose phosphate isomerase Glyceraldehyde-3-P dehydrogenase Phosphoglycerate kinase +7.56 0.0472 +2.41 +6.30 0.0786 -1.29 -18.9 2060 +0.1 3-Pglycerate- + ATP- 3-Phosphoglycerate =2phosphoglycerate 2-Phosphoglycerate-= Phosphoglycerate mutase +4.4 0.169 +0.83 Enolase +1.8 0.483 +1.1 phosphoenolpyruvate-+ H,0 Phosphoenolpyruvate- + ADP- + H* = Pyruvate + ATpt- Pyruvate + NADH + H*= lactate" + NAD* Pyruvate kinase -31.7 3.63 x 10 -23.0 Lactate dehydrogenase -25.2 2.63 x 10 -14.8
Transcribed Image Text:Use the following table for all questions in the problem set related to glycolysis: TABLE 18.1 Reactions and Thermodynamics of Glycolysis AG" AG Reaction Enzyme (k/mol) at 25°c (kJ/mol) Hexokinase Glucokinase a-D-Glucose + ATPt-= -16.7 850 -33.9* glucose-6-phosphate?- + ADP- + H* Glucose-6 phosphate²-=fructose-6-phosphate- Fructose-6-phosphate- + ATP-= fructose-1,6-bisphosphate- + ADP- + H* Fructose-1,6-bisphosphate dihydroxyacetone-P- + glyceraldehyde-3-P:- Dihydroxyacetone-P=glyceraldehyde-3-P- Glyceraldehyde-3-P- + P?- + NAD*= 1,3-bisphosphoglycerate- + NADH + H* 1,3-Bisphosphoglycerate + ADP- Phosphoglucoisomerase Phosphofructokinase +1.67 0.51 -2.92 -14.2 310 -18.8 Fructose bisphosphate aldolase +23.9 6.43 X 10-3 -0.23 Triose phosphate isomerase Glyceraldehyde-3-P dehydrogenase Phosphoglycerate kinase +7.56 0.0472 +2.41 +6.30 0.0786 -1.29 -18.9 2060 +0.1 3-Pglycerate- + ATP- 3-Phosphoglycerate =2phosphoglycerate 2-Phosphoglycerate-= Phosphoglycerate mutase +4.4 0.169 +0.83 Enolase +1.8 0.483 +1.1 phosphoenolpyruvate-+ H,0 Phosphoenolpyruvate- + ADP- + H* = Pyruvate + ATpt- Pyruvate + NADH + H*= lactate" + NAD* Pyruvate kinase -31.7 3.63 x 10 -23.0 Lactate dehydrogenase -25.2 2.63 x 10 -14.8
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