Chapter 18 - Respiration Flashcards
Why is cellular respiration required
To provide energy for metabolic processes
Where does glycolysis occur
Cytoplasm (near mitochondria?)
Where does the link reaction occur
Mitochondrial matrix
Where does the Krebs cycle occur
Matrix
Where does oxidative phosphorylation occur
Inner mitochondrial membrane
(Between Intermembrane space and matrix)
The role of NAD(H) in cellular respiration
NADH used in oxidative phosphorylation to produce ATP
1NADH = 3ATP
The role of FAD(H) in cellular respiration
FADH used in oxidative phosphorylation to produce ATP
1FADH=2ATP
Role of CoA in cellular respiration
Transports the acetyl group from the link reaction to the Krebs cycle
When may anaerobic respiration occur
No oxygen
Oxygen is the final electron acceptor in ETC, if there’s none, oxidative phosphorylation can’t occur
Anaerobic respiration: fermentation
- glycolysis (pyruvate, 2ATP, NADH)
- pyruvate decarboxylated to ethanal (pyruvate decarboxylase)
- ethanol reduced to ethanol (alcohol dehydrogenase and NADH)
Anaerobic respiration: lactate fermentation
Glycolysis: (2ATP, NADH, pyruvate)
- pyruvate converted into lactate by lactate dehydrogenase (involves reduction by NADH)
Where and how is lactate converted back into glucose
Cori cycle in the liver
What is a respiratory quotient
Unitless value for the ratio of the volume of CO2 produced to the volume of O2 consumed
Formula for RQ
(CO2 vol produced)/ (O2 vol consumed)
