Homework Answers
NADH(aq) + H^+ (aq) ------------> NAD^+ (aq) + 2H^+ (aq) + 2e^- E0 = 0.33v
oxaloacetate^2- (aq) + 2H^+ (aq) + 2e^- ---------> malate^2- (aq) E0 = -0.166v
---------------------------------------------------------------------------------------------------------
NADH(aq) + oxaloacetate^2-(aq) +H^+ (aq) -----------> NAD^+(aq) + malate^2- (aq) E0cell = 0.164v
n = 2
DG0 = -nE0cell*F
= -2*0.164*96500
= -31652J
DG0 = -RTlnK
-31652 = -8.314*298.15lnK
lnK = -31652/(-8.314*298.15)
lnK = 12.77
K = 3.5*10^5 >>>>answer
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Need help with part 2 The standard potentials for the reduction of nicotinamide adenine dinucleotide (NAD+)...
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2. Nicotinamide adenine dinucleotide (NADH) acts as a Redox catalyst in the electron transport chain of mitochondria to supply protons for the synthesis of ATP. Calculate the oxidation state for the carbon atoms highlighted in red in the structures below. Which compound is the reduced form and which is the oxidized form? NADH NAD
11.Calculate the standard free energy change for the oxidation of malate by NAD+ under physiological conditions....
11.Calculate the standard free energy change for the oxidation of malate by NAD+ under physiological conditions. Given, (30 points) Malate «Oxaloacetate + 2H+ + 2e- Eo’ = 0.166 V NAD++ H+«2e-+ NADH Eo’ = - 0.315 V
The reduced form of the coenzyme nicotinamide adenine dinucleotide is abbreviated NADH. In the presence of...
The reduced form of the coenzyme nicotinamide adenine dinucleotide is abbreviated NADH. In the presence of a variety of enzyme catalysts, NADH acts as a biological hydride donor, capable of reducing aldehydes and ketones to alcohols, according to the general formula OH enzyme -LR + NADH + H+ + R + NAD The carboxylic acid functional group is not reduced. Draw the product in each of the three NADH reduction reactions shown. Draw the product of Reaction A. Select Draw...
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The body can break down alcohol through the following reaction: ethanol + NAD +→ acetadehyde +...
The body can break down alcohol through the following reaction:
ethanol + NAD +→ acetadehyde + NADH + H+ Calculate Delta G* for
this reaction at 25C.
The standard reduction potentials are:
ethanol →acetaldehyde + 2H+ + 2e- E = -0.197V
NAD+ + H+ + 2e- → NADH E= -0.320V
1. The body can break down alcohol through the following reaction: ethanol + NAD* acetadehyde + NADH+H* Calculate AGº for this reaction at 25°C. The standard reduction potentials are: ethanol...
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For the reaction: L-Malate + NAD⁺ ← → Oxaloacetate + NADH ΔE' = -0.154 n=2 T=298...
For the reaction: L-Malate + NAD⁺ ← → Oxaloacetate + NADH
ΔE' = -0.154
n=2
T=298 K
using the equation
ln (Keq) = (nFΔE'৹)/(RT)
Find Keq?
I know this sounds just plug and chug but am confused about the
signs of the numbers when plugged in. Please only answer if you're
of what you're doing!
Standard Reduction Potential of Some Biologically Important Half-Reactions, at pH 7.0 and 25°C (298 K) Half-reaction E' (V) 2H+ + 2e — H, (at standard...
May or may not use Standard Reduction Potentials to answer the question. Standard Reduction Potentials at...
May or may not use Standard Reduction Potentials to
answer the question.
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Question 2a (1 pt): Alcohol dehydrogenase catalyzes the reversible reaction shown. In the space below, write...
Question 2a (1 pt): Alcohol dehydrogenase catalyzes the reversible reaction shown. In the space below, write the two half-reactions for the redox reaction. Then, determine the cell potential (AE) and standard Gibbs free energy change (AG) for the reaction. (Hint: Use Tables 13.7a/b in "Metabolism Overview") Acetaldehyde + NADH+H→ Ethanol + NAD Question 2b (1 pt): Under physiological conditions, the reaction actually proceeds in the direction that has a positive AG. What would be the minimum value of the reaction...
1. The body can break down alcohol through the following reaction: ethanol + NAD + acetadehyde...
1. The body can break down alcohol through the following reaction: ethanol + NAD + acetadehyde + NADH+H* Calculate AGⓇ for this reaction at 25°C. The standard reduction potentials are: ethanol - acetaldehyde + 2H+ + 2e E-.0.197 V NAD + H+ +2e - NADH E = -0.320 V HINT: These reactions are already balanced and written in the correct direction. You do not need to flip either of these reactions. 2. Electrolysis is used to plate zinc from a...
2. Nicotinamide adenine dinucleotide (NADH) acts as a Redox catalyst in the electron transport chain of mitochondria to supply protons for the synthesis of ATP. Calculate the oxidation state for the carbon atoms highlighted in red in the structures below. Which compound is the reduced form and which is the oxidized form? NADH NAD
The reduced form of the coenzyme nicotinamide adenine dinucleotide is abbreviated NADH. In the presence of a variety of enzyme catalysts, NADH acts as a biological hydride donor, capable of reducing aldehydes and ketones to alcohols, according to the general formula OH enzyme -LR + NADH + H+ + R + NAD The carboxylic acid functional group is not reduced. Draw the product in each of the three NADH reduction reactions shown. Draw the product of Reaction A. Select Draw...
1 point Nicotinamide adenine dinucleotide (NAD+) is an essential cofactor for many metabolic reactions. Lack of the precursor to NAD+, niacin, results in the human disease called pellagra, thus humans have evolved salvage pathways to breakdown and re-synthesize NAD+ when needed. Below is the chemical structure of NAD+. Enzymes catalyze reactions in parts of the protein called an active site. This portion of the protein forms favorable weak interactions with the substrate and stabilize the transition state, which is crucial...
The body can break down alcohol through the following reaction:
ethanol + NAD +→ acetadehyde + NADH + H+ Calculate Delta G* for
this reaction at 25C.
The standard reduction potentials are:
ethanol →acetaldehyde + 2H+ + 2e- E = -0.197V
NAD+ + H+ + 2e- → NADH E= -0.320V
1. The body can break down alcohol through the following reaction: ethanol + NAD* acetadehyde + NADH+H* Calculate AGº for this reaction at 25°C. The standard reduction potentials are: ethanol...
Name Standard Reduction Potentials of Some Biologically Important Half-Reactions TABLE 13-7 Amino acids pki k2 pkR Half-reaction 2.34 9.60 2.34 9.69 1.99 10.96 2.32 9.62 2.36 9.60 2.36 9.68 Ubiquinone + 2H+ + 2e-→ ubiquinol + H: 0.045 Fumarate:-+ 2H. + 2e-→ succinate"- 2H+ + 2e-→ H2 (at standard conditions, pH 0) 0.000 Crotonyl-CoA+2H +2butyryl-CoA0.015 Oxaloacetate:-+ 2H+ + 2e-→ malate"--0.166 Pyruvate +2H2elactate Acetaldehyde + 2H+ + 2e-→ ethanol FAD +2HFADH2 Glutathione + 2H+ + 2e- Alanine Proline 0.031 228 921...
For the reaction: L-Malate + NAD⁺ ← → Oxaloacetate + NADH
ΔE' = -0.154
n=2
T=298 K
using the equation
ln (Keq) = (nFΔE'৹)/(RT)
Find Keq?
I know this sounds just plug and chug but am confused about the
signs of the numbers when plugged in. Please only answer if you're
of what you're doing!
Standard Reduction Potential of Some Biologically Important Half-Reactions, at pH 7.0 and 25°C (298 K) Half-reaction E' (V) 2H+ + 2e — H, (at standard...
May or may not use Standard Reduction Potentials to
answer the question.
Standard Reduction Potentials at 298 K E° (V) 2.08 v 1.776 v 1.33 v 0.800 v 0.520 v 0.337 v 0.159 v 0.000 v -0.227 v 0.42 v 0.90 v 2.36 v 2.84 v 2.92 v Half-reaction O3 +2 H+1 22 H20+02 H202 + 2 H +2 e -2 H20 Cr207 + 14 H+6e-->2 Cr+7 H20 Cu +e Cu Cut2 +2e Cu 2H+1+2e -H2 Co2 +2e --Co Cr2+2e-Cr...
Question 2a (1 pt): Alcohol dehydrogenase catalyzes the reversible reaction shown. In the space below, write the two half-reactions for the redox reaction. Then, determine the cell potential (AE) and standard Gibbs free energy change (AG) for the reaction. (Hint: Use Tables 13.7a/b in "Metabolism Overview") Acetaldehyde + NADH+H→ Ethanol + NAD Question 2b (1 pt): Under physiological conditions, the reaction actually proceeds in the direction that has a positive AG. What would be the minimum value of the reaction...
1. The body can break down alcohol through the following reaction: ethanol + NAD + acetadehyde + NADH+H* Calculate AGⓇ for this reaction at 25°C. The standard reduction potentials are: ethanol - acetaldehyde + 2H+ + 2e E-.0.197 V NAD + H+ +2e - NADH E = -0.320 V HINT: These reactions are already balanced and written in the correct direction. You do not need to flip either of these reactions. 2. Electrolysis is used to plate zinc from a...
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