Cellular Respiration Flashcards
(45 cards)
what is cellular respiration?
how heterotrophs get useable energy (ATP) from the food eaten, and a series of redox reactions
two types of cellular respiration
aerobic (w/ oxygen) and anaerobic (w/o oxygen)
oxidation
redox reaction that loses electrons LEO
reduction
redox reaction that gains electrons GER
what is the ultimate driving force for the recharging of ATP?
electrons
what are the reactants in cellular respiration?
sugar (glucose) C6H12O6 and oxygen 6O2
where is energy stored?
the bonds that hold the atoms together
what happens if a bond is broken?
energy is released
does ATP or ADP store more energy?
ATP
what is ATP used for ?
work
when we eat food we are adding energy to
ADP
what are the electron carriers?
NAD and FAD w/o electrons, NADH and FADH2 w/ electrons
what do the electron carriers do?
pick up electrons in the first two stages of cellular respiration and dump them off at the final stage where electrons can be used to generate more ATP
stages of cellular respiration
glycolysis, Krebs cycle, electron transport chain
goal of glycolysis
to break apart glucose (into pyruvate)
how many carbons does glucose have?
6
where does glycolysis take place?
in the cytoplasm
what is the net gain of ATP in glycolysis?
+2, because it loses 2 then adds 4
where does the Krebs cycle take place?
in the mitochondrial matrix
in the Krebs cycle, what does the pyruvate turn into?
acetyl coA, by removing a carbon in the form of CO2
where does the electron transport chain take place?
in the inner mitochondrial membrane
how are electrons passed in electron transport chain?
electrons from NADH and FADH2 are passed from protein to protein in the mitochondrial membrane
what is the final electron acceptor in ETC?
oxygen
what happens in the final electron acceptor in ETC?
oxygen accepts the electrons and it combines with the hydrogen to form water