Cellular Respiration Flashcards
(24 cards)
What is cellular respiration?
Is the process of breaking bonds and shifting electrons from one molecule to the next
What specifies an aerobic organism?
When the the final acceptor is oxygen
What specifies a Anaerobic organism?
Final acceptor is an inorganic molecule
What are redox reactions?
They are reactions in which electrons (e-) are transferred from one reactant to the next
What does it mean for a molecule to become oxidized?
The lose an electron(s)
What does it mean for a molecule to be reduced?
The are gaining an electron (s), reducing the amount of protons.
What electron carriers are used in cellular respiration?
NAD+ and NADH
What is the oxidized form NADH?
NAD+
What is the reduced form of NADH?
NAD+
What purpose to dehydrogenase enzymes serve in terms of cellular respiration?
Dehydrogenase removes a pair of hydrogen atoms from glucose and delivers 2 e- & 1 proton to NAD+ to form NADPH.
The other H+ ion is floating in the solution.
What is the mechanism that slowly releases the energy glucose in steps and its location?
The electron transport chain & is located in the mitochondria
What are the 3 MAIN steps of cellular respiration?
Glycolysis, Citric acid cycle, and Oxidative phosphorylation
What is Glycolysis and where does it take place?
Glycolysis is the breaking down of a glucose molecule into pyruvate and takes places in the cytosol/cytoplasm
What are the net products for every one molecule of glucose through glycolysis?
2 ATP, 2 NADH, & 2 pyruvate molecules
What happens once pyruvate enters the mitochondria?
Pyruvate is converted to Acetyl CoA
Where does the citric Acid Cycle take place?
Takes place in the matrix of the mitochondria
What are the net products of the Citric Acid Cycle?
2 ATP, 6 CO2 (4 Remain), 6 NADH, 2 FADH2
How is oxidative phosphorylation powered?
It’s powered by the redox reaction in the electron transport chain
Where is the electron transport chain located?
The ETC is found in the inner membrane of the mitochondira
The electron transport chain is a series of what?
Redox reactions
What is chemiosmosis?
It is cellular work that derives from a H+ gradient between the inner and outer membrane
What happens when their is an abundance of ATP?
The citric acid Cycle & glycolysis are inhibited
What is the “pacemaker” for cellular respiration?
allosteric enzymes, Phosphofructokinase
What stimulates Phosphofructokinase?
AMP, which signals not enough ATP in the cell
