Question 174 ptsA reaction that begins spontaneously progressively becomes less spontaneous as the reaction proceeds. Consider the equation below and explain thistendency.AG = AG° + RTIN([Product]/[Reactant])O P/R decreases so RTIN(P/R) is largerO The reaction loses thermal energy with timeO P/R increases so RTIN(P/R) is largerO There is less reactant so entropy increases

Answered: Question 17 4 pts A reaction that…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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QUESTION 52 An organism is discovered that thrives in both the presence and absence of oxygen in the air. Curiously, the consumption of sugar increases as oxygen is removed from the organism's environment, even though the organism does not gain much weight. This organism O a. is photosynthetic O b. is a normal member of the animal kingdom O c. must utilize a molecule other than oxygen to accept electrons from the electron transport chain O d. only performs fermentation to make ATP
QUESTION 1 If a reaction has a Delta G of 42: a. The reaction is energy requiring b The reaction is exergonic c. The reaction is endergonic d. The reaction is non-spontaneous e. The reaction is spontaneous QUESTION 2 Which if any, of the following are true of enzymes? a They are biologic catalysts
QUESTION 2 AG of a reaction is influenced by the temperature at which the reaction takes place. This is due to the fact that increasing temperature increases the effect of which of the following variables in calculating AG? O bond energy O enthalpy O entropy O the rate constant
QUESTION 18 Which of the following reactions is energetically favorable? The formation of peptide bonds O The addition of a phosphate.group to ADP O The breaking of glycosidic bonds O The formation of phosphodiester bonds
Question 1: Part a: Assume that the standard free energy of ATP hydrolysis is -31 kJ/mol. Assume the following values for the standard free energy changes of the four reactions: HK -16.7 kJ/mol; PFK -14.2 kJ/mol; PGK -18.9 kJ/mol; PK -31.7 kJ/mol. (from bio.libretexts.org). Use these values to compute the standard free energy of hydrolysis (releasing Pi) of i. glucose 6-P ii. fructose 1,6-bis-P iii. 1,3-bisphosphoglycerate iv. phosphoenolpyruvate Part b: Which of these four compounds is the strongest phosphoryl donor?______________ Which is the weakest?__________________ Part c: The phosphoglycerate kinase reaction is favorable by -18.9 kJ/mol in the glycolytic direction, as stated above. In gluconeogenesis, this step is simply reversed; i.e. it is not one of the three steps in gluconeogenesis that is driven by using different chemistry than that of glycolysis. How can this be? (Be specific: what specific factors could enable reversal of this step?)
is this question true or false
question #47
Question 2 The following illustration shows a sequence of reactions at equilibrium: O the reaction A => B would be favored O the reaction B => A would be favored LY O the reaction C => B would be favored A = If you place A, B, and C in equal amounts in a test tube, what would happen initially? all the reactions would occur at the same frequency O can not be determined from the information provided c= B C
QUESTION 17 What is the effect of a catalyst on a reaction? O It increases the rate. O It decreases the entropy. O It changes the equilibrium. O It makes the products more stable.
Question #3 Complex III (cytochrome bc₁ complex) in the electron transport chain transfers electrons from reduced coenzyme Q to cytochrome c. 3A. Write a balanced equation for the overall redox reaction performed by complex III. Indicate the electron donor and acceptor in the redox reaction. [Do not include the intermediates in this overall reaction. Do not account for proton pumping]. 3B. Calculate the change in the standard reduction potential for this reaction. [see table on page 2]. 3C Which has a lower amount of free energy at the standard state, the products or the reactants?
question #55
QUESTION 12 What chemical species does chymotrypsin stabilize the most during the course of the reaction? OA. the transition state O B. the substrate OC. the product(s) OD. the ES complex CE. the tetrahedral intermediate

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