Cellular Respiration Flashcards
cellular respiration
a redox reaction; the transfer of electrons releases part of their potential energy which is used to generate ATP; C6H1206 + 6O2 = 6CO2 + 6H2O + ENERGY
oxidation
the partial loss of electrons from glucose
chemiosis
Occurs in oxidative phosphorylation; Exergonic flow of H+ drives the regeneration of ATP
glycolysis
A glucose is split into two pyruvate; 2 NADH and 2 H+ are produced; 2 ATP is regenerated
dehydrogenase
Enzymes; remove a pair of hydrogen atoms from the substrate
citric acid cycle
Conversion of pyruvate to acetyl coenzyme (acetyl CoA); 2 ATP, 6 NADH and 2 FADH2 per glucose are formed
pyruvate
comes from glucose in glycolysis; 1 Glucose (6C) = 2 3C
reduction
the partial gain of electrons to oxygen
electron transport chain
Electrons from NADH and FADH travel down to oxygen; Energy released is used to bukd a concentration gradient of H+ across the membrane
FAD+
produced in the citric acid cycle
oxidative phosphorylation
electron transport chain and chemiosis
acetyl CoA
acetyl coenzyme; converts from pyruvates during citric acid cycle
NAD+
Nicotinamide adenine dinucleotide; electron acceptor; turns into NADH
Which of the following statements is correct about an oxidation-reduction (redox)?
The molecule that is reduced gains electrons; The molecule that is oxidized loses electrons
What is the term used for the metabolic pathway in which glucose is degraded to carbon dioxide and water?
cellular respiration
The oxygen consumed during cellular respiration is involved directly in which process or event?
accepting electrons at the end of the electron transport chain
During glycolysis, when glucose is catobolized to pyruvate, most of the energy of glucose is…
used to phosphorylate fructose to from fructose-6-phosphate
Where does glycolysis take place?
cytosol
Which of the following statements about NAD+ is false?
NAD+ has more energy than NADH
