topic 6

Question 1

which organisms use carbon as their energy source

Answer 1

autotrophs: CO2
heterotroph: organic carbon

Question 2

glycolysis: net total and molecules used and produced

Answer 2

prep stage: -2 ATP used, 0 NADH or FADH2 used or produced

pay off stage: 4 ATP produced, 2 NADH produced, 0 FADH2 used or produced

net: 2 ATP, 2 NADH, 2 pyruvate

Question 3

ED pathway (modified glycolytic pathway)

Answer 3

only 1 ATP used in prep stage, 1 NADPH produced

net: 1 ATP, 1 NADPH, 1 NADH+

Question 4

where does TCA cycle occur in eukaryotes/prokaryotes + net total per pyruvate oxidized

Answer 4

eukaryotes: mitochondria prokaryotes: cytoplasm

for each pyruvate oxidized= 3 CO2, 4 NADH, 1 FADH2, 1 ATP

Question 5

aerobic oxidative phosphorylation initial electron donors and final electron acceptor

Answer 5

initial:
NADH to NAD+
FADH2 to FAD+
final:
O2 to H2O

Question 6

anaerobic oxidative phosphorylation initial electron donors and final electron acceptor

Answer 6

initial:
NADH to NAD+
FADH2 to FAD+
final:
NO3- to NO2-

Question 7

photosynthesis

Answer 7

uses light as energy source to drive ETC to produce ATP and reduce NAD or NADH through:

water: converts oxygen when it donates electrons to the ETC
anaerobic PS I: uses hydrogen sulfide, hydrogen gas, or Fe2+ as electron donor in ETC
anaerobic PS II: electrons move from chlorophyll to other carriers, back to chlorophyll (leads to production of proton motif force)

Question 8

oxygenic photosynthesis initial electron donor and final electron acceptor

Answer 8

initial:
H2O to O2
final:
NADP+ to NADPH

Question 9

anerobic PSI initial electron donor and final electron acceptor

Answer 9

initial:
H2S to S
final:
NADP+ to NADPH

Question 10

anaerobic PS II initial electron donor and final electron acceptor

Answer 10

initial:
chlorophyll
final:
chlorophyll

Question 11

chemolithotrophy initial electron donor and final electron acceptor

Answer 11

initial:
H2S to S
final:
O2 to H2O