Stage 3 of Catabolism: TCA Cycle

Question 1

acetyl~CoA can be used to synthesize

Answer 1

fatty acids

Question 2

what is the TCA cycle

Answer 2

central circular amphibolic pathway in which the acetyl group from acetyl~CoA is oxidized to C02

Question 3

which organisms use the TCA cycle

Answer 3

bacteria that respire aerobically, modified versions of TCA cycle uses by bacteria that are fermenting. alternate pathways produce all required intermediates for anabolism w/o producing NADH, FADH2, AND C02

Question 4

step 1 acetyl~CoA

Answer 4

acetyl~CoA donates the acetyl group and is linked to 4 carbon product of the last rxn of TCA cycle. product: a 6 carbon citrate. hign nrg bond provides the nrg for this anabolic rxn

Question 5

net overall for ever acetyl

Answer 5

3 NADH and 1 FADH2 are produced by redox. 1 ATP is produced by SL(P). 2 CO2 are produced by decarboxylation

Question 6

name the only enzyme of the TCA that is membrane bound and its prosthetic group

Answer 6

succinate dehydrogenase. prosthetic group is FAD

Question 7

what is the reduced form of oxygen

Answer 7

water

Question 8

anabolism

Answer 8

some intermediates are used to synthesize aa