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What circumstances make it beneficial for eukaryotic organismsto get energy through fermentation instead of cellularrespiration?

Explain the concept of an electron transport chain as it appliesto photosynthesis and respiration. What work isperformed as electrons are transported down this gradient? How isthis work used to generate ATP?

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Nestor Rutherford
Nestor RutherfordLv2
30 Sep 2019

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When electrons are passed down the electron transport chain in the mitochondria during respiration (or in the chloroplast during photosystem II), the series of redox reactions that carry the electrons along gradually lose energy. Where does this energy go? It is…

a)lost as heat.

b)used to move protons (H+) across a membrane, against their concentration gradient.

c)used to make NADH in mitochondria or NADPH in chloroplasts.

d)used to split water into hydrogen and oxygen.

I believe the answer is D but I'm not sure

Use The Youtube Link to answer the following Questions: https://www.youtube.com/watch?v=Gpx6i8DXgks

Based at the diagram you drew, answer the following questions: A) How much energy is harvested in glycolysis (use ATP and potential ATPs as metric)? B) When is the oxidation of the glucose molecule completed? Explain what indicated that. C) What part/component of the glucose molecule is used in the electron transport chain? D) How does the electron transport chain contribute to ATP production? Cyanide poisoning causes a type of hypoxia by inhibiting cytochrome c oxidase, which is the very last protein in the electron transport chain. A) Explain how/why cyanide inhibition of cytochrome c oxidase interferes with cellular respiration. B) Does the cell have any alternative to keep glycolysis going? C) Explain the purpose of oxygen in respiration. A) Explain what would happen to ATP production in a mitochondrion that has “leaky membranes”, which would allow protons to diffuse through. B) Explain how the proton gradient contributes to ATP production.

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