lesson 8

Question 1

harvested electrons undergo a series of redox reactions

Answer 1

electrons harvested from organic molecules possess energy
-redox reactions transfer electrons and associated energy
-electrons lose some energy with each transfer
-released energy may be lost as heat or may eventually be converted into ATP
-after multiple redox reactions, energy-depleted into electrons are transferred to final electron acceptor

Question 2

aerobic respiration of glucose

Answer 2

C6H12O6 +6O2-> 6CO2 +6H2O energy
final electron acceptor is oxygen
delta G=-686 kcal/mol of glucose
energy must be harvested in small steps
small steps involve electron carriers