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Select the true statement regarding thermodynamics. C) The △G" of a reaction is...
2. For the following reaction: ATP+ creatine + H2O creatine phosphate + ADP + P, The...
2. For the following reaction: ATP+ creatine + H2O creatine phosphate + ADP + P, The relevant half reactions are: ATP → ADP + Pi Creatine phosphate + H2O-> creatine AG-30.5 kJ/mol ΔG°,--43.1 kJ/mol a. (2 pts.) Calculate the ΔG°, for the overall reaction. b. (2 pts.) Is the reaction spontaneous or non-spontaneous? Endergonic or exergonic?
1.Energy stored in the covalent bonds of a molecule of C6H12O6 would best be described as?...
1.Energy stored in the covalent bonds of a molecule of C6H12O6 would best be described as? Why wouldn't it be kinetic energy? 2.Reaction (1) is A + B <--> C + H2O. It is endergonic with a ΔG = 6.3 kcal/mol Reaction (2) is ATP + H2O <--> ADP + Pi . It is exergonic with a ΔG = -7.3 kcal/mol If these two reactions are coupled, what is the overall free energy for the reaction? 3.For enzyme catalzyed reactions, what...
Determine if the statement given is true or false. If it is false, change the underlined...
Determine if the statement given is true or false. If it is false, change the underlined word(s) so that the statement reads true. ___ Within a closed system, the amount of energy is variable over time. ___ A fire creates energy. ___ The second law of thermodynamics is concerned with entropy. ___ Photosynthesis and similar reactions decrease entropy. ___ Eventually, all molecules in the universe will become randomly dispersed. ___ Reactions that release energy are endergonic. ___ Enzymes increase the...
5.The following reaction has a ΔG°'--61.9 kJ/mol at 25°C, Phosphoenolpyruvate (PEP) +H2O Pyruvate + Inorganic Phosphate...
5.The following reaction has a ΔG°'--61.9 kJ/mol at 25°C, Phosphoenolpyruvate (PEP) +H2O Pyruvate + Inorganic Phosphate (Pi) (a) Is the reaction favorable under standard biochemical conditions? Explain your answer. (b) What is the equilibrium constant (K) of this reaction at 25°C? In cells the direct hydrolysis of PEP rarely occurs. Rather, the hydrolysis of PEP and the reverse hydrolysis of ATP are coupled (c) w rite out the coupled reaction and determine its ΔG at 25°C The hydrolysis of ATP...
Thinking Through the Concepts Multiple Choice 1. Which of the following is True? a. Enzymes increase...
Thinking Through the Concepts Multiple Choice 1. Which of the following is True? a. Enzymes increase activation energy requirements. b. Activation energy is required to initiate exergonic reactions. Heat cannot supply activation energy. c. d. Stomach acid inactivates pepsin. 2. Which is not an example of an exergonic reaction? a. photosynthesis b. a nuclear reaction in the sun c. ATP → ADP + Pi d. glucose breakdown .3, which of the following is True? a. ATP is a long-term energy...
1)Reversible processes are generally: A)Exergonic B) Spontaneous C) At equilibrium D) Endergonic 2) Which of the...
1)Reversible processes are generally: A)Exergonic B) Spontaneous C) At equilibrium D) Endergonic 2) Which of the following processes would be considered reversible? A) The digestion of food B) The melting of ice at 0oC C) The vaporization of water at 75oC D) The rusting of iron 3) Which of the following is a statement of the first law of thermodynamics? A) A state of complete order occurs at absolute zero B) A spontaneous process will occur with an increase in...
1. 2. 3. 4. Select all that apply. Identify the reaction(s) of glycolysis inhibited by ATP □ glyceraldehyde-3-phosphate → 1,3-bisphosphoglycerate phosphoenolpyruvate +pyruvate 3-phosphoglycerate...
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Select all that apply. Identify the reaction(s) of glycolysis inhibited by ATP □ glyceraldehyde-3-phosphate → 1,3-bisphosphoglycerate phosphoenolpyruvate +pyruvate 3-phosphoglycerate ~2-phosphoglycerate 1) fructose-6-phosphate→ fructose-1,6-bisphosphate . glucose glucose-6-phosphate Select all that apply. Alcohol fermentation: consumes ATP as it produces ethanol. O produces carbon dioxide begins as pyruvate is decarboxylated to acetaldehyde in a reaction catalyzed by alcohol dehydrogenase m regenerates NAD requires the enzyme alcohol dehydrogenase, In the figure below, what is the reaction occurring at the location...
Select the true statement about the two-step reaction represented in the energy diagram shown below. Energy...
Select the true statement about the two-step reaction represented in the energy diagram shown below. Energy om Reaction Coordinate B. The reaction is endergonic and the second step is the rate-determining step. The reaction is exergonic and the first step is the rate-determining step. с. The reaction is endergonic and the first step is the rate-determining step. The reaction is exergonic and the seconds step is the rate-determining step. D.
Sample 2 1. Write the I law of thermodynamics. 2. What is the exergonic reaction? 3....
Sample 2 1. Write the I law of thermodynamics. 2. What is the exergonic reaction? 3. Choose the correct answer. The processes of vital functions are a) reversible; b) irreversible; c) in equilibrium. 4. Choose the correct answer. Chemical thermodynamics studies the thermodynamic properties of the substances depending on a)the state, color, structure; b)the state, structure, energy: c) the state, structure, compositions. 5. Standard enthalpy formation of HCl equals -92.05 kJ/mol, HI equals -25.1 kJ/mol. Calculate the standard enthalpy change...
The reaction catalysed by pyruvate kinase is: K'eg 3.63 x 105 Phosphoenolpyruvate + ADP -> pyruvate ATP a) Calculate the AG°" for this reaction. Show your working. 3 marks b) The hydrolysi...
The reaction catalysed by pyruvate kinase is: K'eg 3.63 x 105 Phosphoenolpyruvate + ADP -> pyruvate ATP a) Calculate the AG°" for this reaction. Show your working. 3 marks b) The hydrolysis of ATP has following equation: ATP+H20ADP P AG-30.5 kJ/mol Calculate the AG" for the following reaction: Phosphoenolpyruvate -> pyruvate Pi Show your working. 2 marks c) At 37 °C, the steady-state concentrations of phosphoenolpyruvate, ATP, and ADP have been measured to be 23 μΜ, 1.85 mM and 140...
2. For the following reaction: ATP+ creatine + H2O creatine phosphate + ADP + P, The relevant half reactions are: ATP → ADP + Pi Creatine phosphate + H2O-> creatine AG-30.5 kJ/mol ΔG°,--43.1 kJ/mol a. (2 pts.) Calculate the ΔG°, for the overall reaction. b. (2 pts.) Is the reaction spontaneous or non-spontaneous? Endergonic or exergonic?
Determine if the statement given is true or false. If it is false, change the underlined word(s) so that the statement reads true. ___ Within a closed system, the amount of energy is variable over time. ___ A fire creates energy. ___ The second law of thermodynamics is concerned with entropy. ___ Photosynthesis and similar reactions decrease entropy. ___ Eventually, all molecules in the universe will become randomly dispersed. ___ Reactions that release energy are endergonic. ___ Enzymes increase the...
5.The following reaction has a ΔG°'--61.9 kJ/mol at 25°C, Phosphoenolpyruvate (PEP) +H2O Pyruvate + Inorganic Phosphate (Pi) (a) Is the reaction favorable under standard biochemical conditions? Explain your answer. (b) What is the equilibrium constant (K) of this reaction at 25°C? In cells the direct hydrolysis of PEP rarely occurs. Rather, the hydrolysis of PEP and the reverse hydrolysis of ATP are coupled (c) w rite out the coupled reaction and determine its ΔG at 25°C The hydrolysis of ATP...
Thinking Through the Concepts Multiple Choice 1. Which of the following is True? a. Enzymes increase activation energy requirements. b. Activation energy is required to initiate exergonic reactions. Heat cannot supply activation energy. c. d. Stomach acid inactivates pepsin. 2. Which is not an example of an exergonic reaction? a. photosynthesis b. a nuclear reaction in the sun c. ATP → ADP + Pi d. glucose breakdown .3, which of the following is True? a. ATP is a long-term energy...
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Select all that apply. Identify the reaction(s) of glycolysis inhibited by ATP □ glyceraldehyde-3-phosphate → 1,3-bisphosphoglycerate phosphoenolpyruvate +pyruvate 3-phosphoglycerate ~2-phosphoglycerate 1) fructose-6-phosphate→ fructose-1,6-bisphosphate . glucose glucose-6-phosphate Select all that apply. Alcohol fermentation: consumes ATP as it produces ethanol. O produces carbon dioxide begins as pyruvate is decarboxylated to acetaldehyde in a reaction catalyzed by alcohol dehydrogenase m regenerates NAD requires the enzyme alcohol dehydrogenase, In the figure below, what is the reaction occurring at the location...
Select the true statement about the two-step reaction represented in the energy diagram shown below. Energy om Reaction Coordinate B. The reaction is endergonic and the second step is the rate-determining step. The reaction is exergonic and the first step is the rate-determining step. с. The reaction is endergonic and the first step is the rate-determining step. The reaction is exergonic and the seconds step is the rate-determining step. D.
Sample 2 1. Write the I law of thermodynamics. 2. What is the exergonic reaction? 3. Choose the correct answer. The processes of vital functions are a) reversible; b) irreversible; c) in equilibrium. 4. Choose the correct answer. Chemical thermodynamics studies the thermodynamic properties of the substances depending on a)the state, color, structure; b)the state, structure, energy: c) the state, structure, compositions. 5. Standard enthalpy formation of HCl equals -92.05 kJ/mol, HI equals -25.1 kJ/mol. Calculate the standard enthalpy change...
The reaction catalysed by pyruvate kinase is: K'eg 3.63 x 105 Phosphoenolpyruvate + ADP -> pyruvate ATP a) Calculate the AG°" for this reaction. Show your working. 3 marks b) The hydrolysis of ATP has following equation: ATP+H20ADP P AG-30.5 kJ/mol Calculate the AG" for the following reaction: Phosphoenolpyruvate -> pyruvate Pi Show your working. 2 marks c) At 37 °C, the steady-state concentrations of phosphoenolpyruvate, ATP, and ADP have been measured to be 23 μΜ, 1.85 mM and 140...
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