anaerobic respiration

why cant anaerobic respiration take place for a long time?

only produces 2x ATP her ATP,

which is a low energy yield, so doesn’t release enough energy to continue these cell processes for very long

when does anaerobic respiration take place?

when there is no O2 available/ in anaerobic conditions

without NAD, what happens ?

glycolysis is halted as TP can’t be oxidised

what is the purpose of anaerobic respiration/ fermentation?

to regenerate NAD- extra step at end of glycolysis. allows synthesis of 2ATP per glucose, prevents pyruvate from moving on to link reaction as its converted to something else

why do we need to regenerate NAD

limited supply of NAD in cytoplasm and without NAD, glycolysis stops

what does this image show

anaerobic respiration of animals and bacteria

explain this process of anaerobic respiration of animals and bacteria

pyruvate reduced to become lactate

takes 2 hydrogen atoms from NADH

NADH is oxidised

reversible reaction- energy from lactate molecule can be retrieved when oxygen is available

what does anaerobic respiration cause

oxygen debt

what can too much lactate cause?

toxic/muscle fatigue/muscle cramp/PH decrease which affects enzyme

what does this image show?

anaerobic respiration in plants and fungi

explain the process of anaerobic respiration in plants and fungi (ethanol fermentation)

Pyruvate decarboxylated + reduced to form ethanol.

NADH oxidised and releases 2 hydrogens, forming NAD.

energy lost. irreversible

is energy lost or gained in ethanol fermentation

lost

is ethanol fermentation a reversible reaction

no