Answered: electron carriers (NAD+/NADH and…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Question

7. Why are electron carriers (NAD+/NADH and FAD/FADH2) so important in the process of cellular respiration?

a) They deliver electrons to the ETC, which in turn sets up chemiosmosis, where most of the ATP is generated.

b) They separate the electrons from the protons so that the protons can be moved out of the mitochondrion.

c) NADH and FADH2 are major components of the ETC, so without them, there would be no ETC in the cell.

d) The electrons that they carry are able to directly phosphorylate ADP in order to generate the bulk of ATP in the cell.

e) They transport protons across the mitochondrial membrane.

Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

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