Consider the reaction.kpS PkgWhat effects are produced by an enzyme on the general reaction?AG for the reaction increases.The rate constant for the reverse reaction (kr) increases.The reaction equilibrium is shifted toward the products.The concentration of the reactants is increased.The activation energy for the reaction is lowered.The formation of the transition state is promoted.

Enzyme: A protein that catalyzes a chemical reaction by lowering activation energy. Transition…

Answered: Consider the reaction. kp S P kg What…

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter18: Glycolysis

Section: Chapter Questions

Problem 23P: Examine the ActiveModel for alcohol dehydrogenase and describe the structure and function of the...

See similar textbooks

Similar questions

Which of the following comparisons or contrasts between endergonic and exergonic reactions is false? Endergonic reactions have a positive ?G and exergonic reactions have a negative ?G Endergonic reactions consume energy and exergonic reactions release energy Both endergonic and exergonic reactions require a small amount of energy to overcome an activation barrier Endergonic reactions take place slowly and exergonic reactions take place quickly.
Which of the following statements about the allosteric site is true? a. The allosteric site is a second active site on a substrate in a metabolic pathway. b. The allosteric site on an enzyme can allow the product of a metabolic pathway to inhibit that enzyme and stop the pathway. c. When the allosteric site of an enzyme is occupied, the reaction is irreversible and the enzyme cannot react again. d. An allosteric activator prevents binding at the active site. e. An enzyme that possesses allosteric sites does not possess an active site.
In an enzymatic reaction: a. the enzyme leaves the reaction chemically unchanged. b. if the enzyme molecules approach maximal rate, and the substrate is continually increased, the rate of the reaction does not reach saturation. c. in the stomach, enzymes would have an optimal activity at a neutral pH. d. increasing temperature above the optimal value slows the reaction rate. e. the least important level of organization for an enzyme is its tertiary structure.
Which of the following statements about inhibition is true? a. Allosteric inhibitors and allosteric activators are competitive for a given enzyme. b. If an inhibitor binds the active site, it is considered noncompetitive. c. If an inhibitor binds to a site other than the active site, this competitive inhibition. d. A noncompetitive inhibitor is believed to change the shape of the enzyme, making its active site inoperable. e. Competitive inhibition is usually not reversible.
Using the ActiveModel for enoyl-CoA dehydratase, give an example of a case in which conserved residues in slightly different positions can change the catalytic rate of reaction.
Describe the position of the transition state on a vertical energy scale, from low to high, relative to the position of the reactants and products, for both endergonic and exergonic reactions.
Understanding a Ubiquitous Series of Metabolic Reactions Study Figure 23.9. Where else in metabolism have you seen the chemical strategy and logic of the -oxidation pathway? Why is it that these two pathways are carrying out the same chemistry?
Using the ActiveModel for aldose reductase, describe the structure of the TIM barrel motif and the structure and location of the active site.
Energetic of Fructose-1 ,6-bis P Hydrolysis (Integrates with Chapter 3.) The standard free energy change (G) for hydrolysis of fructose-1. 6-bisphosphate (FBP) to fructose-S-phosphate (F-6-P) and P: is -16.7 KJ/mol: FBP + H2O fructose-6-P + Pi The standard free energy change (G) for ATP hydrolysis is -30.5 KJ/mol: ATP + H2O ADP + Pj What is the standard free energy change for the phosphofructokinase reaction: ATP + fructose-6-P ADP + FBP b. What is the equilibrium constant for this reaction? c. Assuming the intracellular concentrations of [ATP] and (ADP] are maintained constant at 4 mM and 1.6 mM, respectively, in a rat liver cell, what will be the ratio of [FBP]/[fructose-6-P] when the phosphofructokinase reaction reaches equilibrium?
The energy released by the hydrolysis of ATP is primarily stored between the alpha and beta phosphates equal to -57 kcal/mol harnessed as heat energy by the cell to perform work providing energy to coupled reactions
Figure 27.3 illustrates the response of R (ATP-regenerating) and U (ATP-utilizing) enzymes to energy charge. a. Would hexokinase be an R enzyme or a U enzyme? Would glutamine: PRPP amidotransferase, the second enzyme in purine biosynthesis, be an R enzyme or a U enzyme? b. If energy charge = 0.5: Is the activity of hexokinase high or low? Is ribose-5-P pyrophosphokinase activity high or low? c. If energy charge = 0.95: Is the activity of hexokinase high or low? Is ribose-5-P pyrophosphokinase activity high or low?
Figure 6.8 Look at each of the processes shown, and decide if it is endergonic or exergonic. In each case, does enthalpy increase or decrease, and does entropy increase or decrease?

SEE MORE QUESTIONS

Recommended textbooks for you

Biochemistry

ISBN:

9781305577206

Author:

Reginald H. Garrett, Charles M. Grisham

Publisher:

Cengage Learning

Biology 2e

Biology

ISBN:

9781947172517

Author:

Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:

OpenStax

Biology: The Dynamic Science (MindTap Course List)

Biology

ISBN:

9781305389892

Author:

Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:

Cengage Learning

Biochemistry

ISBN:

9781305577206

Author:

Reginald H. Garrett, Charles M. Grisham

Publisher:

Cengage Learning

Biology 2e

Biology

ISBN:

9781947172517

Author:

Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:

OpenStax

Biology: The Dynamic Science (MindTap Course List)

Biology

ISBN:

9781305389892

Author:

Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:

Cengage Learning

Biochemistry

ISBN:

9781305961135

Author:

Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal

Publisher:

Cengage Learning

Biology (MindTap Course List)

Biology

ISBN:

9781337392938

Author:

Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:

Cengage Learning

Case Studies In Health Information Management

Biology

ISBN:

9781337676908

Author:

SCHNERING

Publisher:

Cengage

SEE MORE TEXTBOOKS