lecture 14- part 6

Question 1

what can neurons not survive without

Answer 1

O2

Question 2

what does aerobic respiration require to make ATP

Answer 2

O2

Question 3

what metabolic processes allow a cell (or organism) to make ATP in absence of O2

Answer 3

-fermentation
-anaerobic respiration

Question 4

what is fermentation performed by

Answer 4

by faculative anaerbobes (can use O2)

like yeast

Question 5

what is anaerboci respiration performed by

Answer 5

performed by strict anaerobes (O2 is toxic to them)

Question 6

fermentation

Answer 6

uses aerobic respiration when O2 is present but can surivie by doing fermnetation when O2 is low or absent

Question 7

when does pyruvate enter the fermentation pathway

Answer 7

when O2 is low or absent

Question 8

what does fermentation allow gkycolysis to do

Answer 8

allows glycolysis to continue to take place when the rest of aerobic respiration can’t due to lack of O2

Question 9

why is it advantegsou for cells to be able to do glycolysis without rest of aerobic respiration pathway

Answer 9

fermentation allows glycolysis to continue in absnece of O2 by regnerating NAD+

-fermentation pathways oxidize NADH into NAD+
-allows glycolysis to continue to make ATP for the cell

Question 10

what are the pathways of fermentation

Answer 10

-alcohol fermentationa nd lactic acid fermentation

Question 11

alcohol fermentation

Answer 11

pyruvate oxidized to CO2 and ethanol (how beer is made)

Question 12

lactic acid fermentation

Answer 12

pyruvate (3-c) converted to lactate (3-c) NADH -> NAD+ so glycolysis can continue

Question 13

purpose of two pathways of fermentation

Answer 13

regenerate NAD+ to continue glycolysis

Question 14

why do cells perform fermentation?

Answer 14

to regenrate NAD+ so they can continue to perofmr glycolysis and make ATP (until the cell can go back to aerobic respiration)