In cellular respiration, what is being oxidized and what is being reduced?

Answer 1

#"NAD"^+# and #"FADH"# are being reduced and later oxidezed. The molecule they receive the electrons from are being oxidized.

#color(red)"The basic terms"# Oxidation and reduction is about the transfer of electrons:

#color(red)"Electron carriers in cellular respiration"# An important part of cellular respiration is the transfer of electrons. In the first two phases of cellular respiration (glycolysis and Krebs cycle) electrons are transferred to a carrier molecule. In the third phase (electron transport chain) the electrons are taken from the carrier and used to make energy (ATP).

The transporters are:

#color(Red)"What gets reduced and what gets oxidized?"# The molecules #"NAD"^+# and #"FADH"# gain electrons, so these are being reduced .

Electrons originate from molecules involved in the Krebs cycle and glycolysis, which undergo oxidation.

In the last phase of cellular respiration, the electron transport chain, #"FADH"_2# and #"NADH"# are also being oxidized when they give off their gained electrons.

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Answer 2

Maya Anderson

Oxygen is reduced and glucose is oxidized during cellular respiration.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.