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BIOL 1201 Lecture : Lecture 11

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azuremammoth471
15 Mar 2019
School
LSU
Department
Biological Sciences
Course
BIOL 1201
Professor
All

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Document Summary

Maintained by the exergonic flow of electrons in the electron transport chain. If the number of hydrogen ion punps in the ets is increased, what impact will this have on substrate level atp phosphorylation. Active transport of hydrogen ions powered by the flow of electron s along the etc. The o2 used in respiration is not used to form co2. Powered by the flow of hydrogen ion back across the inner membrane. All coenzyme would be in the reduced form nadh. Need to regenerate nad from nadh for glycolysis to continue. There is a constant pool of coenzyme and it. Plants, yeast, some fish (cold adapted carp and goldfish) Without regeneration of nad glycolysis would come to a halt. No additional atp is produced at this step. A 70 kg man produces 150 g or hydrogen ions per day. In the absence of oxygen, pyruvate is ____ to lactate.

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Related Questions

Oxidative phosphorylation is the final stage of cellular respiration and the main pathway of aerobic energy generation from glucose. Which of the following statements is NOT true?

a. NADH and FADH2 are used as ‘input’ into the electron transport chain

b. The electron transport chain produces a proton gradient across the inner mitochondrial membrane

c. FADH2 stores less energy than NADH

d. The electron transport chain is made up of several membrane protein complexes

e. ATP synthesis by chemiosmosis requires about 30 protons per ATP molecule

The free energy of ATP synthesis from ATP synthase under cellular conditions is +45 kJ/mol.

a. Where does the energy come from?

b. If the pH of the matrix is 7.84, the intermembrane space is 7.16 and the membrane potential is +/- 0.15 V at 37 C, how much energy can be produced from this gradient per mol of protons?

c. How many moles of protons moving across this gradient would be required to produce enough energy for one mole of ATP to be synthesized?

d. To generate a proton gradient the mitochondria use the energy of electron transport. How much energy is produced in the oxidation of NADH by oxygen (under standard biochemical conditions)?

e. Using the answer from b, how many moles of protons could be transported out of the matrix with this oxygen energy (d)?

f. How many moles of protons are actually transported in the oxidation of NADH theough the ETC?

2. The free energy of ATP synthesis from ATP synthase under cellular conditions is +45 kJ/mol.

a. Where does the energy come from?

b. If the pH of the matrix is 7.84, the intermembrane space is 7.16 and the membrane potential is 0.15 V at 37 °C, how much energy can be produced from this gradient per mol of protons?

c. How many moles of protons moving across this gradient would be required to produce enough energy for one mole of ATP to be synthesized?

d. To generate a proton gradient the mitochondria use the energy of electron transport. How much energy is produced in the oxidation of NADH by oxygen (under standard biochemical conditions)?

e. Using your answer from b, how many moles of protons could be transported out of the matrix with this oxidation energy (d)?

f. How many moles of protons are actually transported in the oxidation of NADH through the ETC?