Question

Which of the following is true regarding ᐃG? (mark all that apply) Group of answer choices

When Keq is >> 1, ᐃG is large and negative

When Keq is << 1, ᐃG is large and positive

When Keq is << 1, ᐃG is small and positive

When Keq is << 1, ᐃG is large and negative

When Keq is >> 1, ᐃG is small and positive

2-Why is coupling of reactions an important biochemical mechanism to allow non-spontaneous reactions to occur (select all that apply)?

Group of answer choices

Coupling reactions allows cells to make more than one product at a time; thus, it is a very efficient biochemical mechanism.

Coupling provides for reactions to occur at a very rapid pace, that is necessary for life.

3-Most organisms can only survive within a relatively narrow temperature range - changing the temperature at which reactions occur is therefore not usually viable.

Consider the reaction shown below:

A + B --> C + D

The ΔG° for the reaction is 14 KCal/mol.

In order to make this reaction proceed spontaneously in the forward direction, we can couple this reaction with which of the following reactions (select all that apply)?

Group of answer choices

Any spontaneous reaction that liberates free energy

No answer text provided.

A reaction whose ΔG° is less than -14KCal/mol

A reaction that involves one of the products or reactants, and which is spontaneous

Answer 1

1. ∆G◦ is related to equilibrium constant Keq. However, ∆G is related to the spontaneity of the reaction.Thus for 1. question ∆G◦ has been considered. The questions are little bit ambiguous. Thus, I made few assumptions to answer them.