Course

Biotechnology

Study Pack

Set 13 Bioenergetics And Biochemical Reaction Types

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Question 1

(Multiple Choice)

Free
In glycolysis, fructose 1,6-bisphosphate is converted to two products with a standard free-energy change ( Δ\Delta G'°) of 23.8 kJ/mol. Under what conditions encountered in a normal cell will the free-energy change ( Δ\Delta G) be negative, enabling the reaction to proceed spontaneously to the right?

A) Under standard conditions, enough energy is released to drive the reaction to the right.
B) The reaction will not go to the right spontaneously under any conditions because the Δ\Delta G'° is positive.
C) The reaction will proceed spontaneously to the right if there is a high concentration of products relative to the concentration of fructose 1,6-bisphosphate.
D) The reaction will proceed spontaneously to the right if there is a high concentration of fructose 1,6-bisphosphate relative to the concentration of products.
E) None of these conditions is sufficient.

Answer

Question 2

(Multiple Choice)

Free
For the reaction A \rightarrow B, the Keq' is 10-6. If a reaction mixture originally contains 1 mmol of A and 1 mmol of B, which statement must be TRUE?

A) At equilibrium, there will be still be equal levels of A and B.
B) The rate of the reaction is very slow.
C) At equilibrium, the amount of A will greatly exceed the amount of B.
D) The reaction will proceed toward B at a very high rate.
E) Δ\Delta G'° for the reaction will be large and positive.

Answer

Question 3

(Multiple Choice)

Free
Hydrolysis of 1 M glucose 6-phosphate catalyzed by glucose 6-phosphatase is 99% complete at equilibrium (i.e., only 1% of the substrate remains). Which statement is MOST nearly correct? (R = 8.315 J/mol · K; T = 298 K)

A) Δ\Delta G'° is -11 kJ/mol.
B) Δ\Delta G'° is -5 kJ/mol.
C) Δ\Delta G'° is 0 kJ/mol.
D) Δ\Delta G'° is +11 kJ/mol.
E) Δ\Delta G'° cannot be determined from the information given.

Answer