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what happens to most of the energy in glucose
most of the energy in glucose remains stored in the two pyruvate molecules produced by glycolysis
where does pyruvate go in a eukaryotic cell go if O2 is present
enters the mitochondrion to complete glucose oxidation
where does pyruvate go in a eukaryotic cell go if O2 is NOT present
goes to the cytosol
what must happen before the citric acid begins
a pyruvate must be converted to acetyl coenzyme A (acetyl CoA)
where does the citric acid cycle occur
occurs in the mitochondria
does the citric acid cycle require O2
the citric acid cycle does require O2
how is acetyl CoA produced
needs one pyruvate molecule and makes NADH+, H+, and CO2
what does pyruvate dehydrogenase do
it catalyzes three reactions
what does the oxidation of pyruvates carboxyl group do
releases the first CO2 of cellular respiration
is any ATP generated during the process of pyruvate dehydrogenase catalyzing
no ATP is generated at all
what happens first in the mitochondria before the citric acid cycle begins
Pyruvate is transported to the mitochondrial matric before it is converted to acetyl CoA
other name for the citric acid cycle
the triboxylic acid cycle (TCA) or Krebs cycle
where does the citric acid cycle take place
in the mitochondrial matrix
what does the citric acid cycle oxidize
it oxidizes organic fuel derived from one molecule of pyruvate
the citric acid cycle oxidizing organic fuel generates what
1 ATP, 3 NADH, and ! FADH2
what does the partial oxidation of organic fuel do
breaks C-C bonds and releases CO2
what happens to the electrons from the oxidation of pyruvic acid
the electrons are added to NAD+ and Fad (an electron carrier) to produce NADH and FADH2
where does the 1 ATP come from in the citric acid cycle
is assembled from ADP + PO4 through substrate level phosphorylation using the energy from oxidation
what are the products of the citric acid cycle
2 ATP, 6 NADH+ 6 H+, 2 FADH2, 4 CO2
what is FAD
an electron carrier that becomes reduced when it accepts electrons to become FADH2
what is the first step of the citric acid cycle
the acetyls group of acetyl acid joins the cycle by comping with oxaloacetate forming citrate
what are the following 7 steps of the citric acid cycle
the next 7 steps of the citric acid cycle are decomposing the citrate back to oxaloacetate which makes the process a cycle
what does the NADH and FADH2 produced by the cycle do
they relay electrons to the electron transport chain