Home
Flashcards
Preview
bio chp 9
Home
Get App
Take Quiz
Create
Automatically remove your image background. Try it now!
https://remove-image-background.com
FERMENTATION
define
: a metabolic pathway that regenerates NAD
+
from stockpiles of NADH, allows glycolysis to continue producing ATP in absence of oxygen
process stops before pyruvate processing
in most organisms cellular respiration cannot occur without oxygen
when does it occur?
when pyruvate or a molecule derived from pyruvate accepts e
-
from NADH
the transfer of e
-
oxidizes NADH to NAD
+
with NAD
+
glycolysis can continue to produce ATP via substrate-level phosphorylation
fermentation will end with:
a net of 2 ATP
per glucose molecule
:
fermentation --- 2 ATP
cellular respiration --- 29 ATP
different fermentation pathways
lactic acid fermentation
: occurs in most multi-cellular organisms
alcohol fermentation
: ethanol & NAD
+
are produced, occurs in yeast
lactic acid fermentation
pyruvate produced by glycolysis accepts e
-
from NADH
lactate and NAD
+
are produced
occurs in muscle cells
*no oxygen present
alcohol fermentation
pyruvate is enzymatically converted to acetaldehyde & CO
2
acetaldehyde accepts e
-
from NADH
ethanol & NAD
+
are produced
what happens during
extreme
exercise
no O
2
present
:
glucose --- pyruvate(oxidized) + NADH(reduced) ---lactate(reduced) + NAD
+
(oxidized)
NAD
+
is reused to make more glucose to start the process all over
build up of lactic acid...side cramp! end with a lot of lactic acid in liver, its converted to glucose(in case lack of more O
2
)
Author
leamusic
ID
50948
Card Set
bio chp 9
Description
november 21, 2010
Updated
2010-11-21T22:38:38Z
Show Answers
Home
Flashcards
Preview