Bio 141 Notes (3/04/14) Flashcards Preview

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Flashcards in Bio 141 Notes (3/04/14) Deck (20):
1

Glycolysis

Glucose - > 2 pyruvate (2x 3-C)
Sugar breaking down

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Step 1 of Glycolysis

energy investment phase
energy source - phosphate
phosphates are added to glucose

3

Step 2 of Glycolysis

sokit one 6-C molecule into two 3-C molecules

4

Where does gylcolysis take place?

Cytoplasm

5

Glycolysis yields...

2 NADH

6

Glycolysis genetates ____ ATP?

4
net gain - 2

7

Substrate - level Phosphorylation

involves the immediate transfer of phosphate between molecules via an enzyme

8

Step 3 of Glycolysis

NADH - temporary carrier
energy payoff phase
-yields 2 NADH
-substrate level phosphorylation

9

Cellular Respiration

Glycolysis
Pyruvate Oxidation
Citric Acid Cycle
Oxidative Phosphorylation

10

Pyruvate oxidation

starts in cytoplasm
transport into mitochondrial matrix
One NADH produced
One carbon released as CO2

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Pyruvate Oxidation Formula

Pyruvate (3-C) -> aceyl CoA + CO2 +NADH

12

Citric Acid Cycle

takes place in mitochondrial matrix

13

What releases electrons to membrane proteins?

NADH and FADH2

14

Oxidative Phosphorylation

NADH and FADH2 release electrons to membrane proteins
electron energy powers active transport
establishes a proton gradient

15

Electron Transport Chain

First Step of oxidative phsophorylation
makes the proton gradient
electons join with O2 and H+ to form water
oxygen serves as the ulltimate electron receptor

16

ATP Synthesis

Second Step of oxidative phsophorylation
uses the proton graident
fuels the major ATP yield of cellular respiration
one ATP produced for each H+ that crosses the membrane

17

Oxidation Phosphorylation

oxidation coupled with ATP production

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Energy Carrier

NADH, FADH, NADPH

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Energy carriers in oxidized forms

NAD+, FAD, NADP+

20

Potential for energy

High concentration
hydrogen ions are mutually repulsive