Glycolysis is the process by which energy is harvested from glucose by living th

Question

Glycolysis is the process by which energy is harvested from glucose by living things. Several of the reactions of glycolysis are thermodynamically unfavorable (nonspontaneous), but proceed when they are coupled with other reactions Which of these reactions is(are) unfavorable? Select all that apply. P_1 + glucose rightarrow glucose-6-phosphate + H_2 O Delta G = 13.8 kJ/mol P_1 + fructose-6-phosphate rightarrow fructose- 1, 6-bisphosphate+ H_2O Delta G = 16.3 kJ/mol ATP + H_2O rightarrow ADP + P_1 Delta G = -305 kJ/mol A B C Which of these reactions can be coupled so that the overall reaction is favorable? Select all that apply. A and B A and C B and C What is the net change in free energy if one set of reactions from part (b) is coupled so that the overall reaction is favorable? (if you selected more than one pair of reactions in part (b), enter the net change for any one of your selected sets)

Explanation / Answer

A and B are unfavorable, as they have positive free energy change. In actuallity, these reactions happen coupled with the third reaction, which makes the sum negative

A and C, B and C are coupled!

A and C = -16.7 kJ/mol

B and C = -14.2kJ/mol

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