When the Polymer X-X-X

question 56

Multiple Choice

When the polymer X-X-X ...is broken down into monomers, it is "phosphorylyzed" rather than hydrolyzed, in the following repeated reaction:
                              X-X-X ...+ P ? X-P + X-X ...(reaction 1)
Given the ?G° values of the reactions listed in Table 3-27, what is the expected ratio of X-phosphate (X-P) to free phosphate (P) at equilibrium for reaction 1?
                              X-X-X ...+ H₂O ? X + X-X ...?G° = ?4.5 kcal/mole
                              X + ATP ? X-P + ADP ?G° = ?2.8 kcal/mole
                              ATP + H₂O ? ADP + P ?G° = ?7.3 kcal/mole
Table 3-27

• A)1:10⁶
• B)1:10⁴
• C)1:1
• D)10⁴:1

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