Which of the following strategies are used by biological systems to ensure an enzymatic reaction will proceed?   a. Addition of reactants   b. Coupling with more energetic reactions   c. A more positive ∆G   d. Removing products

Which of the following is true about allosteric enzymes? A. Allosteric enzymes are always multimeric. B. Regulatory sites (allosteric sites) on an allosteric enzyme are always different from the catalytic site. C. Allosteric enzymes always change the conformation of the active site in response to binding of an allosteric modulator. D. Suicide inactivators are examples of allosteric modulators.

Enzymes are: A. Broken down in reactions that require energy input.  B. Not needed forr catabolic reactions. C. Electron carrier molecules.  D. Proteins that function as catalysts.  E. All of the choices are correct.

Which of the following is true for all exergonic reactions? Group of answer choices A. The reactions are nonspontaneous B. A net input of energy from the surroundings is required for the           reactions to proceed C. Some reactants will be converted to products D. The products have more total energy than the reactants E. The reaction proceeds with a net release of free energy

the loss of electrons by one atom or molecule to another a. oxidation b. reduction c. catalysis d. synthesis e. degradation

What roles do enzymes play in nature? Group of answer choices A.They have a role in metabolic reactions B. They increase rates of reaction but do not shift the equilibrium formed between products and reactants C. They catalyze cellular processes D. All of the above

What is true about a competitive inhibitor of an enzyme? You can choose more than one a. it binds the active site b. it binds an allosteric site c. it physically blocks the substrate d. it warps the active site e. it can be overcome with large amounts of substrate

As you change the temperature from a low temperature to a high temperature what happens to the rate of an enzymatic reaction, in general terms?   A The reaction rate will steadily increase as the temperature increases.   B The reaction rate will steadily decrease as the temperature increases.   C The reaction rate will start low, then increase, and then decrease again as the temperature increases.   D The reaction rate will not change as the temperature increases.

Which of the following statements concerning ATP is true? a. The free energy value for the hydrolysis of ATP is nearly the same for ADP. b. The free energy value for the hydrolysis of ATP is greater than that for ADP. c. ATP hydrolysis is more likely at pH 5 than at pH 7. d. One mole of glycerate-1,3-bisphosphate can phosphorylate one mole of AMP to yield ATP.

Which of the following is a reactive oxygen species that can damage proteins? Select one: a. vitamin C b. superoxide c. arsenic d. oxygen e. heat