Chapter 27, Problem 23P

The phosphorylation of $\text{α-D-glucopyranose}$ by ATP (Section 27.3) has ${\text{ΔG}}^{\text{ο'}}=-2\text{3 kJ}$ at $\text{298 K}$.

Is this reaction exergonic or endergonic?

How would the value of ${\text{ΔG}}^{\text{ο'}}$ change in the absence of the enzyme hexokinase? Would it become more positive, more negative, or would it stay the same? Why?

Use the value for the hydrolysis of ATP to ADP (Section 27.5) to calculate ${\text{ΔG}}^{\text{ο'}}$ for the reaction of $\text{α-D-glucopyranose}$ with inorganic phosphate. Is this reaction exergonic or endergonic?