SCIENCE
RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Gains protons, electrons, and energy.
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Releases protons, electrons, and energy.
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Loses energy to the environment.
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Experiences catabolic reactions that cause an overall emission of energy.
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Detailed explanation-1: -In the process of glycolysis, NAD+ is reduced to form NADH + H+. If NAD+ is not present, glycolysis will not be able to continue. During aerobic respiration, the NADH formed in glycolysis will be oxidized to reform NAD+ for use in glycolysis again.
Detailed explanation-2: -The NAD+ becomes reduced when it gains an electron, and the other molecule that donates the electron becomes oxidized. Thus, when NAD+ picks up an electron, it becomes reduced and the molecule that donates it becomes oxidized.
Detailed explanation-3: -NADH has a hydrogen attached to one nitrogen-containing ring, whereas in NAD+ this same ring lacks a hydrogen and has a positive charge. The reactions in which NAD +start superscript, plus, end superscript and FAD gain or lose electrons are examples of a class of reactions called redox reactions.
Detailed explanation-4: -NADH is the reduced form of the electron carrier, and NADH is converted into NAD+. This half of the reaction results in the oxidation of the electron carrier. Pyruvate is converted into lactic acid in this reaction.