Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 9.3, Problem 4R
Summary Introduction
To review:
The consequences of experiment in figure 9.9 in the presence of antimycin A drug.
Introduction:
Figure shows an experiment, which was performed to prove that a proton concentration gradient drove formation of adenosine triphosphate (ATP) in the chloroplasts. Chemiosmosis occurs after electron transport chain (ETC) occurs inside mitochondria, in which production of ATP takes place by influx of protons back into the matrix of mitochondria.
The antimycin A drug is known to block electron transport in the chloroplasts and mitochondria.
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which of the following woudl decrease the number of atp molecules generated per nadh molecule in the electron transport chain?
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Life: The Science of Biology
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- The above reaction (FADH2 donating its electrons to the electron transport chain) takes place in whichof the following eukaryotic cell locations?A. the mitochondrial matrixB. the thylakoid membrane of chloroplastsC. the chloroplast stromaD. the inner mitochondrial membraneE. the cytoplasmarrow_forwardHydrogen cyanide gas is a lethal poison that binds to the last cytochrome molecule in the electron transport system. What effect would this have at the cellular level?arrow_forwardATP generationinvolves electron transport chains and the enzyme ATPsynthase, which are embedded in the mitochondrion’s______ membrane.arrow_forward
- Which of the following electron-transport chain complexes is not a member of the respirasome? a. Complex I b. Complex II c. Complex III d. Complex IVarrow_forwardWhich would be expected to generate more ATP per electron carried—NADH or FADH2?arrow_forwardExcited molecules can return to the ground state by severalmeans. Describe each briefly. Which of these processes areimportant in photosynthesis? Describe how they function ina living organism.arrow_forward
- Explain the following statement: The O2 generated by photosynthesis is simply a by-product of the pathway’s generation of carbohydrates and ATP.arrow_forwardComplexes I and II of the electron transport complex transfer electrons from NADH and succinate, respectively, to _____________.arrow_forwardIn the electron transport chain, NADH is oxidized at complex ____, and FADH2 is oxidized at complex _____.arrow_forward
- Show how the reactions of the electron transport chain differ from those in Question 3 when FADH2 is the starting point for electron transport. Show how the reactions that liberate enough energy to drive the phosphorylation of ADP differ from the pathway when NADH is the starting pointarrow_forwardDescribe some similarities between the electron transportchains in chloroplasts and in mitochondria.arrow_forwardIn electron transport, each of the following respiratory complexes is involved in the flow of electrons from NADH to O2 except A) complex I. B) complex II. C) complex III. D) complex IV. E) All of the complexes are involvedarrow_forward
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