9.3 Fermentation

Question 1

Cellular respiration cannot contiune because though glycolysis doesn’t require oxygen, NADH molecules produced have nowhere to go because __________ so no NAD+ molecules are produced, stoping glycolysis

Answer 1

the electron transport chain doesn’t work,

Question 2

When oxygen isn’t present, glycolysis is followed by a pathway that makes it possible to continue to produce__________ without oxygen.

Answer 2

ATP

Question 3

In the absence of oxygen, fermentation releases energy from:

Answer 3

food molecules by producing ATP

Question 4

during fermentation, cells convert NADH to NAD+ by:

Answer 4

passing high-energy electrons back to pyruvic acid, allowing glycolysis to produce a steady supply of ATP

Question 5

fermentation is an _____ process that occurs in the cytoplasm of cells, and there are __ types

Answer 5

anaerobic, 2

Question 6

Describe 3 things about alcoholic fermentation:

Answer 6

1) used by yeast and other microrganisms
2) produces ethyl alcohol and CO2
3) used to make alcoholic beverages and causes bread to rise

Question 7

what is the equation for alcoholic fermentation?

Answer 7

pyruvic acid+ NADH yeilds alcohol + CO2 + NAD+

Question 8

describe 3 things about lactic acid fermentation

Answer 8

1) most organisms use including humans, most commonly with muscle cells
2) converts pyruvic acid to lactic acid, doesn’t give off CO2
3)prokaryotes used to make cheese, yogurt, pickles, etc.

Question 9

what is the equation for lactic acid fermentation

Answer 9

pyruvic acid + NADH yeilds lactic acid + NAD+

Question 10

For short quick bursts of energy, the body uses ATP already in muscles as well as ATP made by

Answer 10

lactic acid

Question 11

For exercise longer than about 90 seconds, ____________ is the only way to continue generation a supply of ATP

Answer 11

cellular respiration