Question

Aerobic Respiration In aerobic respiration, for each glucose molecule bacterial cells harvest 36 to 38ATP molecules. Explain, why their is a difference 36 to 38?

Answer 1

aerobic respiration involve complete breakdown of glucose molecule into carbondioxide and water using oxygen as final electron.

* Aerobic Anaurobic Resperation Produce 36 ATP /38 ATP Respitation Poodluce 2 ATP. COM 12 O + O CO₂ + H₂O. (cytoplcym) CYTOSOL ATT CYTOSOL Glycose (6 cabbon) LATP consumed) Hexokinase / Glucokinase ADP Glucose-6- diced cytool sisheshin Phosphone t Phospho Hexose Iso mesase Fructose-t- Phosphate CATP Loroumed) Di Phosphofouctokinase in ATP SAT 30 ATP in mitochondria) outer mamboone MITROCHONDRIA ADP Fouctose -1,6. NOR BY Phosphate I Aldose TGATEWRDHA rytum none Total (27 In memben ANA PAD FAO rona . 4 ATH* "2 undehve C247Sabstech lete Cool PADM2 W ass Phoopgon Succincte succinate succinale Tha@vinos danydory B rishgh ihre TP ced in Malate, NADIX Malta) Kehygg ADH THE Aconitan Dinyol.cheepocetune Phosphotocalyceraldehyde B) (34) phosphate t he 3- Phosphate Izomerase Total 6 in mcon No ANADH = BATP) Glyconaldehyde t 3-Phosphate badrus Phosphafichon u clihydrogenen and the T, 3, Bisphosphoglyaratet a K.G Fumarate LATP (Substrate level and for ADP ocitat 1 2 ADie H Phosphoglycurate Kinase Poodluced » Phosphaylation 2 Ame turno d hydrogen TCA Cycle I '3- Phosphogly cerate LAIPNAD I socitoute 84 ATP oxidative M. Mutane j Phosphaglycenate Boduced in a 2 Prosphegycorate THA (mitchah Makake dehyggreguen Aconitor , oxicoli ATP Seahirse output Pheophoenolpypuvate & g 4t E CAR und - no need ADP (Subtitate to cochons RATB x - Pyruvate of CA Pon Acetyl 3 CA] Lactic acid LOHA Anaribit I Aerobic < Pyruvate the T NEDT (Pyounite 20, TNAOM THT Quchale) LOHB- 2 Melux 3 coobon. 6 ATP-Portutect Acetyl con I - in J anaurobot x 2 Carbon Conversion of Pyruvete into Ap Pooduced) Acoyl cost in mitochondron citrate t endase Ho he Prigoy who AT Schydraznese) (2 molecules of (2 ATP sphings in total pohuay

It take place in 3steps-

1. Glycolysis occuring in cytoplasm

2. Kreb cycle occring in mitochondria

3 electron transport change and oxidative Phosphyrlysation occuring in inner mitochondrial membrane.

In glycolysis, 2molecules of glucose is oxidised to produce 2molecules of pyruvate releasing 2NADPH( 2*3=6 ATP) by oxidative Phosphorylation and 4ATP are produced by substrate level Phosphorylation. Out of them 2ATP are consumed.

Therefore. Out of 10, 8 remain

Under aerobic respiration (o2 present) pyruvate enter into link reaction occuring in mitochondrial matrix . Here 2molecules of pyruvate undergo oxidative decarboxylation to produce 2molecules of acetyl Co-A with release of carbon dioxide and 2NADH2 (6ATP)

After this 2acetlyco-A enter into krebs/TCA cycle And undergo complete oxidation leading to release of 2FAD(2*2=4ATP) , NADH2 ans 2ATP /GTP(substrate level) .

Total 30ATP in mitochondrial matrix through tca.

Calculations giving 36-38 ATP per glucose are based on the assumption that oxidation of NADH produces 3 ATP and oxidation of UQH2 (FADH2, Succinate) produces 2 ATP. ... They translocate protons outward across the inner mitochondrial membrane, and the resulting proton gradient is used by the ATP synthase to produce ATP