u3: anaerobic respiration/fermentation Flashcards
(10 cards)
1
Q
does glyclolysis need oxygen?
A
no
2
Q
anaerobic respiration
A
- alternate metabolic process when O2 not available
- less ATP formed than aeroboic respiration
- waste products (besides CO2 and water) accumulate in extracellular space
3
Q
does fermentation produce ATP?
A
- no
- fermentation regenerates NAD+ which continues glyolysis
- glycolysis makes ATP
4
Q
2 types of fermentation + where they occur
A
- alcoholic fermentation: yeasts, bacteria
- lactic acid fermentation: human muscle cells, yogurt-making bacteria
5
Q
applications of fermentation
A
- alcoholic bevs
- making yogurt, bread
- spoilage of food
- lactic acid building up in muscle cells
6
Q
final steps of alcoholic fermentation equation
A
pyruvate + NADH + (H+) 🡪 (NAD+) + CO2 + ethanol
7
Q
overall alcoholic fermentation equation
A
glucose + 2 ADP + 2 Pi 🡪 2 ATP + 2 CO2 + 2 ethanol
8
Q
final steps of lactic acid fermentation equation
A
pyruvate + NADH + (H+) 🡪 (NAD+) + lactate
9
Q
overall lactic acid fermentation equation
A
glucose + 2 ADP + 2 Pi 🡪 2 lactate + 2 ATP
10
Q
how much ATP is made in aerobic respiration vs fermentation?
A
- aerobic makes overall 38 ATP/glucose
- fermentation makes 2 ATP/glucose
