Aerobic Cellular Respiration & Fermentation - Gen Bio

aerobic cellular respiration

uses free oxygen and breaks apart food molecules; more efficient

catabolic pathways

breaking down complex molecules into simpler ones

what are the 3 sets of reactions

glycolysis, pre-krebs (krebs) cycle, & electron transport system

glycolysis

in cytosol, glucose breaks down into 2 pyruvates which produces 4 ATP

what is all produced during glycolysis

4 ATP and 2 NADH

pre-krebs (krebs) cycle

in mitochondrial matrix (hollow), the 2 pyruvates are oxidized into 6CO2 & produce 2 ATP

what is all produced during the pre-krebs cycle

2 CO2 and 2 NADH

what is all produced during the krebs cycle

4 CO2, 2 ATP, 6 NADH, and 2 FADH2

electron transport system

in inner mitochondrial membrane, coenzymes exchange electrons & H+ ions to make 34 ATP

oxidative phosphorylation

the electron transport chain & chemiosmosis; ADP + Pi = ATP

what is all produced during the e- transport system

34 ATP

chemiosmosis

using proton gradient to do work

substrate level phosphorylation

transfer of phosphate group from one molecule to another

__NADH x __ATP=

10 x 3 = 30

__FADH2 x __ATP =

2 x 2 = 4

fermentation pathways

does not use free oxygen to break down molecules; less efficient

what are the 2 fermentation pathways

alcohol and lactate fermentation

alcohol fermentation

glycolysis → invest 2 ATP & gain 4 ATP → 2 pyruvates = 2 acetaldehyde (2C)