Respiration Flashcards
What is oxidative phosphorylation?
Phosphorylation that occurs on the inner membranes of mitochondria in aerobic respiration
Energy comes from REDOX reactions
What is photophosphorylation
Occurs on thylakoid membranes of chloroplasts in light dependent reaction
Energy comes from light and is released from electron carriers
Substrate level phosphorylation
Occurs when phosphate groups are transferred from donor molecules or when enough energy is released to bing ADP to Pi
What is the overall equation for Glycolysis?
Glucose + 2ATP -> 4 ATP + 2Reduced NAD + 2Pyruvate
Where does glycolysis occur?
Cytoplasm
Is glycolysis aerobic?
No it’s anaerobic as it doesn’t require oxygen
Why can’t cells rely on only glycolysis?
There isn’t enough ATP produced to support cell metabolism
What happens in glycolysis?
Glucose (substrate level phosphorylation with 2ATP) Glucose Diphosphate (splits) 2Triose Phosphate (dehydrogenase) 2H reduce NAD to Reduced NAD (substrate level phosphorylation) 2ATP produced from each Pyruvate molecule formed
Where does the link reaction occur?
Matrix of the mitochondria
How do the products of glycolysis move into the matrix?
Active Transport
What is the overall equation for the link reaction?
Pyruvate + CoA -> Reduced NAD + CO2 + Acetyl CoA
Overall what does one turn of the Krebs Cycle produce?
One ATP by substrate level phosphorylation
Three molecules of Reduced NAD
One molecule of Reduced FAD
Two molecules of CO2
What is the total number of ATP molecules produced in respiration
38
Why is 38 only a theoretical yield of ATP?
Leaky membranes where H+ can leak across
Active transport of ATP and Pyruvate into mitochondria
Actually 30-32
How many proton pumps are used in respiration vs photosynthesis?
3 vs 1
although two for Reduced FAD
