Bacteria physiology, Fermentation, Respiration, and ATP synthesis

what is fermentation

oxidation of an organic compound to yield energy where the electrons generated are accepted by an internal electron acceptor

what is substrate-level phosphorylation

ATP is directly synthesized from an energy-rich intermediate

what is oxidated phosphorylation

the dissipation of proton motive force coupled to ATP synthesis

the stages of fermentation

1. stage 1. preparatory reactions

2. stage 2. oxidation (production of NADH, ATP, Pyruvate)

3. stage 3. reduction (redox balance and produce fermentation product)

What is stage 1

• glycolysis

• ATP is used

• Starts with glucose

what is stage 2

• glycolysis (continued)

• ATP is formed

• ends with pyruvate

what is stage 3

• reduction

• NADH dumps e- to become NAD+

different type of fermentation

• Ethanol

• Lactic acid

• Mixed acid

• Propionic acid

what is respiration

oxidation of an organic or inorganic energy source in which electrons pass down an electron transport chain and are accepted by an external electron acceptor

what is Aerobic respiration

• when the electron acceptor is Oxygen

• complete oxidation of glucose to carbon dioxide

what are the steps in Aerobic respiriation

• Glycolysis

• Pyruvate to acetyl CoA

• citric acid cycle

ETC in aerobic respiration

ETC is fueled by the reduced NADH and FADH2 from the citric acid cycle and glycolysis

What does ATPase do

it converts proton motive force (PMF) to ATP

Aerobic respiration with an organic compound as the starting material

Lactic acid fermentation

Glucose → 2 pyruvate → 2 lactate

Process of Aerobic respiration

Glucose → 2 pyruvate → 6 CO2

Anaerobic respiration

when the external electron acceptor is either Nitrate or Sulfate