lecture 14 part 3

Question 1

what happens to the pyruvate from glycolysis in aerboci respiration

Answer 1

pyruvate enters a mitochondria and is conerted to acetyle CoA
-in this reaction pyruvate is oxidized
-occurs in mitochondria of eukaryotic cells and cytosol of prokaryotes

Question 2

oxidized means

Answer 2

loses e-

Question 3

in euaryotes 3 of the 4 steos of aerobic respiration occurs in the _____

Answer 3

mitocondria

Question 4

enzymes for pyruvate oxidation and citric acid cycle are in

Answer 4

the matric

Question 5

1st pyruvate must get into the _____

Answer 5

matrix

Question 6

what helps the pyruvate to pass through outer membrane

Answer 6

large protein that makes it easy for mole to pass outer membrane

Question 7

what helps the pyruvate acorss iner membrane into the matrix. Where does it get its energy from

Answer 7

transsport protein: H+/pyruvate symport protein

-uses enegry released from corssing protons

Question 8

what does oxidation of pyruvate produce PER pyruvate

Answer 8

1 acetyle CoA
-1 CO2
-1 NADH

Question 9

what is oxidation of pyruvate catalyzed by

Answer 9

a large enzyme complex that catalyzes 3 enzymatic rxns at once

Question 10

net energy yield (for glucose catabolism)

Answer 10

2 CoA
-2 CO2
-2NADH

Question 11

describe acetyle CoA moleq

Answer 11

-high energy bond (S)
-nucleotide at end

Question 12

acetyle CoA from pyruvate oxidation step feeds into the what

Answer 12

citric acid cycle

Question 13

what is citric acid cycle also called

Answer 13

Krebs cycle

Question 14

what does citric acid cycle complete the breakdown of

Answer 14

pyruvate to CO2. the cycle oxidizes organic fuel derived form acetyle CoA.

Question 14

1 cycle or “turn” beginning with the entry of acetyle CoA yields what

Answer 14

-2 CO2
-1 ATP
-3 NADH
-1 FADH2

Question 15

how many steps does citric cycle have

Answer 15

8 steps, each catalyzed by a specific enzyme

Question 16

how is citrate formed

Answer 16

the acetyle group of acetyle CoA joins the cycel by combining with oxaloacetate forming citrate

Question 17

what happens after citrtae is formed

Answer 17

the next 7 steps decompose citrate back to oxalcactat making process a cycle

Question 18

what do the NADH and FADH2 prduced by the cycle relay

Answer 18

high energy e- extratcted from food to e- transport chain

Question 19

what is made by substrate level phosphorylation

Answer 19

ATP

Question 20

summary of aerobic respiration so far wth glycolysis and citric acid cycle

Answer 20

Glcose (6-c) kickstarts glycolysis which produces 2 pyruvate + 2 ATP + 2NADH.

The 2 pyruvate help make 2 Acetyle CoA initiating the citric acid cyel which produces 2 ATP + 6 NADH + 6 CO2 + 2 FADH2