28 terms

cellular respiration

The primary purpose of cellular respiration in living organisms is to
produce biologically useful energy in the form of ATP.
how photosynthesis and cellular respiration depend on each other
the products of photosynthesis are the reactants of cellular respiration, and the reactants of photosynthesis are the products of cellular respiration
The NADH and FADH2 that are formed in the Krebs Cycle primarily function to
transfer electrons to the electron transport system
doesnt require the presence of oxygen
the two common fermentation pathways products
ethanol and lactic acid
The final electron acceptor in mitochondrial respiration is
Due in part to its high electron affinity, O2 is the final electron acceptor.
lactic acid fermentation
one hydrogen atom from NADH and one free hydrogen proton
the products of cellular respiration (3)
CO2, water, and ATP
the breakdown of pyruvic acid by enzymes, bacteria, yeasts, or mold in the absence of oxygen
redox reaction
one reactant loses electrons and another gains electrons; cellular respiration
cellular respiration equation
C6H12O6+6O2---> 6CO2+6H2O+ATP
where the reactions of glycolysis take place
step one glycolysis
two phosphate groups are attached to one molecule of glucose, ATP converted to ADP
step two glycolysis
6-carbon molecule split into two 3-carbon molecules that are called G3P
step three glycolysis
G3P molecules lose electrons and receive another phosphate group, two molecules of NAD+ converted into NADH
step four glycolysis
all phosphate groups are removed from the molecule to make two molecules of pyruvic acid, the four released phosphates convert four ADP to four ATP
how NAD+ becomes NADH
electrons released through glycolysis attach to NAD+
process of alcoholic fermentation
CO2 is removed from pyruvic acid, two hydrogen atoms added
two stages of aerobic respiration
krebs cycle and ETC
process by which ATP is made using the energy released as protons move across a memrbrane
function of the krebs cycle?
break down acetlyCoA
mitochondrial matrix
the space inside the inner membrane of a mitochondrion; contains enzymes to catalyze the reactions of the Krebs cycle
in the mitochondrial matrix, pyruvic acid reacts with ? to form ?, and releases a ?
CoA, acetyl CoA, CO2 molecule
efficiency of glycolysis
energy required to make ATP/energy released by oxidation of glucose
loss of electrons and ultimately energy
junction between glycolysis and the krebs cycle
-pyruvate is oxidized into acetyl CoA
transport protien
moves pyruvate from cytosol into matrix of the mitochondria
location and structure of ETC
-inner membrane of the mitochondria
-composed of 3 trans-membrane proteins that work as hydrogen pumps