Multi-step pathway: A => B => C => D => E The substrates in the pathway above ha

Question

Multi-step pathway:
A => B => C => D => E
The substrates in the pathway above have different free energy states. The energy states of the molecules above from greatest to least is B > A > D > C > E. Which of the following statements is true?
A. The overall pathway is endergonic B. The step from B => Cis endergonic C. The overall pathway has a positive delta G D. The overall pathway is exergonic E. The overall pathway is non-spontaneous F. The overall pathway has a negative delta G G. The overall pathway is spontaneous H. The step from A => B is endergonic
Answer is: D, F, G, H
Why is this the answer? How to approach this problem? Multi-step pathway:
A => B => C => D => E
The substrates in the pathway above have different free energy states. The energy states of the molecules above from greatest to least is B > A > D > C > E. Which of the following statements is true?
A. The overall pathway is endergonic B. The step from B => Cis endergonic C. The overall pathway has a positive delta G D. The overall pathway is exergonic E. The overall pathway is non-spontaneous F. The overall pathway has a negative delta G G. The overall pathway is spontaneous H. The step from A => B is endergonic
Answer is: D, F, G, H
Why is this the answer? How to approach this problem?
A => B => C => D => E
The substrates in the pathway above have different free energy states. The energy states of the molecules above from greatest to least is B > A > D > C > E. Which of the following statements is true?
A. The overall pathway is endergonic B. The step from B => Cis endergonic C. The overall pathway has a positive delta G D. The overall pathway is exergonic E. The overall pathway is non-spontaneous F. The overall pathway has a negative delta G G. The overall pathway is spontaneous H. The step from A => B is endergonic
Answer is: D, F, G, H
Why is this the answer? How to approach this problem?

Explanation / Answer

If we look the overall reaction we will find that energy level of reactant is higher than the product. So the reaction is exergonic.

For all the exergonic reaction delta G is negative.

If delta G is negative then the reaction is spontaneous.

In the given energy state we will find that the energy level of B is higher than 1 so in order to produce B from A we need to supply energy so conversion of A to B is endergonic.

So correct options are - D, F, G, H

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