Anaerobic Respiration/Fermentation Flashcards
It involves the use of other molecules as the final electron
acceptor except for oxygen.
anaerobic respiration
another pathway of anaerobic respiration.
- also starts with glycolysis which results in the formation of ATP, NADH, and pyruvate. However, pyruvate molecules do not go through oxidation, Krebs cycle, and ETC.
fermentation
2 kinds of anaerobic fermentation
lactic acid and alcoholic fermentation
this kind of fermentation converts the pyruvate molecules
to lactate. This anaerobic pathway is common to obligate anaerobes. It also happens in our muscle cells during extraneous physical activities.
- e.g, mga fermented foods sa integ
lactic acid fermentation
equation of lactic acid fermentation
C6H12O6 → pyruvate + NADH + H → lactate + NAD+
in lactic acid fermentation, the hydride group from NADH attaches to one of the _______ molecules of pyruvate. Another hydrogen molecule is also used in the process which attaches to the _______ in the pyruvate molecule.
carbons; oxygen
enzyme for lactic acid fermentation
lactate dehydrogenase
this kind of fermentation converts pyruvate molecules to
ethanol
● used in bread and winemaking
- dairy products
alcoholic fermentation
step 1 of alcoholic fermentation
Pyruvate molecules undergo decarboxylation which results in the formation of acetaldehyde.
side product: CO2
enzyme: pyruvate decarboxylase
step 2 of alcoholic fermentation
Acetaldehyde is added with a hydride group from NADH and one hydrogen molecule which results in the formation of ethanol and oxidation of NADH to NAD+
enzyme: alcohol dehydrogenase
since there are two pyruvate molecules from one glucose, the products of each fermentation should be
doubled (2 lahat)
where does the NAD+ produced from glycolysis go?
back to glycolysis
