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Which molecule functions as the reducing agent (electron donor) in a redox or oxidation-reduction reaction?



A. Gains electrons and gains energy.
B. Loses electrons and loses energy.
C. Gains electrons and loses energy.
D. Loses electrons and gains energy.
E. Neither gains nor loses electrons, but gains or loses energy.

This question is part of Chapter 9 Test - AP Biology
Asked by Muitran, Last updated: Jan 15, 2020

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3 Answers

C. Marcus

C. Marcus, Content Developer, Washington

Answered Feb 21, 2019

B is the answer to this question. The process of donating and sending electrons is always going to be important because this is the only way that the atoms will be stable. If there are no electrons that will be shared, it will be problematic.

For example, in aerobic respiration, it will be oxygen that will be the last electron acceptor. What will happen when there is no oxygen available? All of the electrons that are there will not be able to get out and mix with other atoms. Instead, the electrons will be stuck and no reaction will take place. Reactions are always important for electrons so without it, the transport chain will not occur.

 

John Adney

John Adney

Answered Nov 26, 2017

The molecule that functions as the reducing agent (electron donor) in a redox or oxidation-reduction reaction loses electrons and energy.

 

John Smith

John Smith

Answered Mar 13, 2017

Loses electrons and loses energy.
 

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