Exam 8: Energy, Enzymes, and Metabolism

Enzyme Y is a component of a metabolic pathway and is inhibited by a metabolite produced at the end of that particular metabolic pathway.Which statement would not be true regarding this enzyme?

The conversion of A to B, which is an endergonic reaction, can proceed if it is coupled

A chemical reaction is found to have an equilibrium constant of 0.95, which means that there are almost equal concentrations of products and reactants when equilibrium is achieved.If an enzyme is added that will catalyze this reaction, the reaction rate will _______ and the equilibrium point will not change.

How does the second law of thermodynamics apply to living organisms?

Coenzymes differ from enzymes in that coenzymes are

Refer to the table below. How do you predict the G° values for these reactions will compare?

Enzymatic reactions can become saturated as substrate concentration increases because

Fireflies

Which of the following represents kinetic energy?

Which reaction will go the furthest toward completion?

Which of the following is neither created nor destroyed during its conversion?

Zinc or iron ions that bind to enzymes and aid in their function are called _______.

Trypsin and elastase are both enzymes that catalyze hydrolysis of peptide bonds.However, trypsin only hydrolyzes peptide bonds next to lysine, and elastase only hydrolyzes peptide bonds next to alanine.Why?

In order to measure the standard free energy change, G, for the conversion of fructose 6-phosphate to fructose 1,6-bisphosphate, you set up the reaction at 25C with 1 M reactants and

The enzyme hexokinase catalyzes the reaction between ATP and glucose to form glucose 6-phosphate and ADP.In order to determine the efficiency of hexokinase, you wish to conduct an experiment to calculate its turnover number.To do so, you would set up

If all that is required to drive a chemical reaction is heat, why can't we speed up biological chemical reactions by heating the cell?

Which will not increase the rate of conversion of reactant A to product B in the presence of enzyme C?

In order for a coupled reaction to have a net G of ‒3.3 kcal/mol,

Enzymes increase the rate of a reaction in all of the following ways except

In the pathway A + B  C + D, enzyme X facilitates the reaction.If compound D is further metabolized through a series of steps to form compound Z, and compound Z inhibits enzyme X, one could conclude that