Exam 8: Energy, Enzymes, and Metabolism

Use the following to answer questions: In the diagram below, reactants and products are designated by capital letters; enzymes are designated by numbers. -If enzyme 2 is inactive, which of the following products would be produced from the metabolic pathway?

Suppose the reaction A $\leftrightarrow$ B has a large, negative $\Delta$ G. In what direction, how far, and how fast will the reaction proceed?

Which statement about enzyme inhibitors is not true?

Which of the following is an enzyme?

The molecules that are acted on by an enzyme are called

Use the following to answer questions: In the diagram below, reactants and products are designated by capital letters; enzymes are designated by numbers. -If end product E allosterically inhibits enzyme 1, a buildup of E in the cell will result in

What can never be created or destroyed?

In any system, the total energy includes usable and unusable energy. The unusable energy is a measure of the disorder of the system and is referred to as

Enzymatic reactions can become saturated as substrate concentration increases because

The maximum possible rate of an enzyme reaction that is influenced by a competitive inhibitor depends on the concentration of

Enzymes are biological catalysts and function by

Which of the following statements about ATP is true?

Which statement about temperature effects is not true?

The addition of the competitive inhibitor mevinolin slows the reaction HMG-CoA $\to$ mevalonate, which is catalyzed by the enzyme HMG-CoA reductase. The effects of mevinolin would be overcome and the rate of the reaction increased by

A reaction that has a negative $\Delta$ G

The presence of a catalyst affects the

Refer to question 10. Suppose further studies indicate that ascorbic acid is not similar to catechol in size and shape but that the pH of the ascorbic acid solution is altering the protein folding of catecholase. If this is true, then this inhibition is most likely an example of

Which statement about enzymes is not true?

Cells mostly use _______ as an immediate source of energy to drive reactions.

If the enzyme phosphohexoisomerase is added to a 0.3 M solution of fructose 6-phosphate, and the reaction is allowed to proceed to equilibrium, the final concentrations are 0.2 M glucose 6-phosphate and 0.1 M fructose 6-phosphate. These data give an equilibrium constant of 2. What is the equilibrium constant if the initial concentration of fructose 6-phosphate is 3 M?