w An overview of Respiration and FermentationFoundation Figu

w An overview of Respiration and Fermentation-Foundation Figure 5.11 heir high-energy state in fuel molecules (the electron donors), those molecules are he electron acceptor. As it gains electrons, the electron acceptor is reduced. When these elec state compared to their ori will examine three equations and indicate which e energ reduced product. reactants are electron donors and which are r The image below shows three different oxidation-reduction equations. Sort each of the l a 65 CO2 6 H2O C6H12O6 6 O NE

Solution

a-electron donor

b-electron acceptor

c-oxidized donor

d- reduced acceptor

Oxidation is the loss of electrons and Reduction is the gain of electrons.

a undergoes oxidation or loses electron to produce c.

b undergoes reduction or gains electron to produce d.

e-electron donor

f-electron acceptor

g-oxidized donor

h-reduced acceptor

e undergoes oxidation or loses electrons to produce g.

f undergoes reduction or gains electron to produce h.

i-electron donor

j-electron acceptor

k-oxidized donor

l-reduced acceptor

Glucose reacts with oxygen to produce carbon dioxide and water. The carbon atoms in glucose are oxidized. That is, they lose electron and attain a higher oxidation state. The oxygen atoms in oxygen are reduced. They gain electrons and attain a lower oxidation state.