Exam 8: Energy and Enzymes

The following questions) are based on the reaction A + B -C + D shown in the figure provided. -Which of the following represents the difference between the free- energy content of the reactants and the free- energy content of the products in the figure?

Anabolic pathways

Use the figure below to answer the following questions). -Which of the following is the most correct interpretation of the figure provided?

Use the following information to answer the corresponding questions). A series of enzymes catalyze the reaction X -Y -Z -A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme. -What is substance X?

According to the induced fit hypothesis of enzyme catalysis,

Why is ATP an important molecule in metabolism?

Consider the HIV enzyme called protease. The amino acid residues at the active site are highly hydrophobic. In designing a drug that would bind to the active site and jam it, researchers should use a molecule that is

To attach a particular amino acid to the tRNA molecule that will transport it, an enzyme, an aminoacyl- tRNA synthetase, is required, along with ATP. Initially, the enzyme has an active site for ATP and another for the amino acid, but it is not able to attach the tRNA. What must occur for the final attachment to occur?

An allosteric regulator decreases the rate of an enzyme reaction by

Which of the following statements is true about enzyme- catalyzed reactions?

Which of the following is true when comparing an uncatalyzed reaction to the same reaction with a catalyst?

Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier known as the reaction's

Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as _________ is to_________________

Mutations that result in a single amino acid substitution in an enzyme

When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated?

Some of the drugs used to treat HIV patients are competitive inhibitors of the HIV reverse transcriptase enzyme. Unfortunately, the high mutation rate of HIV means that the virus rapidly acquires mutations with amino acid changes that make reverse transcriptase resistant to these competitive inhibitors. Where in the reverse transcriptase enzyme would such amino acid changes most likely occur in drug- resistant viruses?

The following questions) are based on the reaction A + B -C + D shown in the figure provided. -Which of the following in the figure would be the same in either an enzyme- catalyzed or a noncatalyzed reaction?

During a laboratory experiment, you discover that an enzyme- catalyzed reaction has a AG of - 20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the AG for the new reaction?

The mathematical expression for the change in free energy of a system is OG =OH - TOS. Which of the following is are) correct?