Ch 14

Question 1

What is glycolysis

Answer 1

the oxidation of glucose to pyruvic acid

Question 2

respiration relies on an _____________ that enables a microbe to store energy as a proton motive force

Answer 2

electron transport system

Question 3

terminal acceptors for aerobic and anaerobic systems

Answer 3

aerobic: O2
anaerobic: NO3(-), SO3(2-), Fe(3+)

Question 4

The reduction potential (E’) represents

Answer 4

the tendency of a molecule to accept electrons
-measured in millivolts

Question 5

a more negative reduction potential means

Answer 5

a weak electron acceptor
a strong electron donor

Question 6

dG is _____ to the reduction potential

Answer 6

proportional

Question 8

______ is usually the first stage in carbohydrate catabolism

Answer 8

glycolysis

Question 9

EMP pathway produces ATP via

Answer 9

substrate level phosphorylation

Question 10

which 3 processes can bacteria use to convert glucose to pyruvate

Answer 10

-glycolysis (EM pathway)
-entner-doudoroff pathway
-pentose-phosphate shunt

Question 11

entner-doudoroff pathway does

Answer 11

sugar acids catabolism

Question 12

pentose-phosphate shunt produces

Answer 12

pentose sugars

Question 13

pentose phosphate products are used for biosynthesis of

Answer 13

-aromatic amino acids
-nucleotides
-can also form pyruvate

Question 14

fermentation is an _____ process

Answer 14

anaerobic, no O2

Question 15

reactants for fermentation

Answer 15

-glucose
-NAD+
-ADP & Pi

Question 16

fermentation reactions regenerate _____ needed for glycolysis to produce ATP

Answer 16

NAD+

Question 17

glucose catabolism is not complete until

Answer 17

NADHs are recycled

Question 18

what is oxidized in fermentation

Answer 18

NADH

Question 19

organisms that perform alcohol fermentation

Answer 19

yeasts and many bacteria

Question 20

organisms that perform lactic acid fermentation

Answer 20

streptococcus and lactobacterium

Question 21

in the presence of O2 or other terminal electron acceptor, pyruvate can be catabolized to CO2 + H2O via the

Answer 21

Krebs cycle or Tricarboxylic acid cycle

Question 22

in Krebs, 1 glucose produces

Answer 22

-6 NADH
-2 FADH
-2 ATP

Question 23

in Krebs, 1 acetyl CoA produces

Answer 23

-3 NADH
-1 FADH
-1 ATP

Question 24

Krebs reactants

Answer 24

1 glucose

Question 25

TCA intermediates are used for

Answer 25

biosynthetic processes

Question 26

To complete the metabolic pathway, all reduced electron carriers must be

Answer 26

recycled -> electron transport chain

Question 27

oxidative phosphorylation is the

Answer 27

process of electron transport and ATP formation

Question 28

dative phorphorylation relies on

Answer 28

formation of H+ gradient and ATP synthase

Question 29

oxygen is _____ during aerobic respiration

Answer 29

reduced

Question 30

_____ serves as the source of electrons for respiration

Answer 30

glucose

Question 31

pyruvate becomes ______ during acetyl coA formation

Answer 31

oxidized

Question 32

does glycolysis need oxygen to work

Answer 32

no

Question 33

is fermentation the same as anaerobic respiration

Answer 33

no, although fermentation is anaerobic, it is not the same

Question 34

fermentations ATP come from

Answer 34

glycolysis