Cellular resp 3.

Question 1

Respirometers
-simple ones measure what
-an ____ can absorb CO2 produced

Answer 1

-volume changes due to oxygen use
-alkali (KOH, NaOH)

Question 2

Krebs/Citric Acid Cycle
-occurs where
-requires what
-catablizes what to from Co2, process name?
-what is removed during oxidation steps
-link reaction forms what (4)

Answer 2

-matrix
-oxygen
-pyruvate through process of decarboxylation
-high energy H’s
3CO2, 4 NADH +h+, 1 FADH2, 1 ATP

Question 3

Steps in Pyruvate oxidation
(describe the 3 steps)

Answer 3

1. one co2 is removed from EACH pyruvate and released as waste product of decarboxylation
2. remaining 2 carbon protions are oxidized by NAD+ (gains 2H+ and 2e- from pyruvate, and the remaining 2 carbon compounds become an acetic acid)
3. coenzyme A attaches to acid group and forms acetyl CoA which can eneter the Krebs cycle

Question 4

GTP-ATP
some rxns are just ____ (example) whereas the decarboxylations are all coupled with ______ (example)

Answer 4

oxidations (maltate to oxaloacetate and succinate to fumarate)
-oxidations (NADH is made whenever CO2 is)

Question 5

Krebs cycle
-what is it
-carbons removed leave the body as what
-the intermediates are ____. H’s (e-‘s) removed from what molecules (H are transported where in what form)

Answer 5

-a series of chemical reactions to break the 6 carbon cirtric acid molecule back into the 4 carbon ooxaloactate (must recycle the oxaloacetate to keep it going)
-CO2 (decarboxylation)
-oxidinal. removed from molecules reduce NAD+ and FAD and H’s transported to ETC in form of NADH and FAFH2