9 anaerobic respiration

where does anaerobic respiration occur?

in the cytoplasm only

what does the pyruvate from glycolysis produce in plants and microbes and in animals?

ethanol and carbon dioxide in plants and microbes

lactate in animals by gaining hydrogen from NADH

what does the NAD gaining hydrogen do?

oxidises NAD so it can be reused in glycolysis and ensure more ATP is continued to be produced

how does anaerobic respiration happen in animals?

the pyruvate from glycolysis will be reduced to form lactate. this oxidises the NAD to be reused in glycolysis and ensure more ATP is continued to be produced

why can’t anaerobic respiration continue indefinitely?

lactate/ethanol is toxic and will eventually denature enzymes involved in glycolysis to stop respiration

how does anaerobic respiration happen in plants and microbes?

the pyruvate from glycolysis will be reduced to form ethanol and carbon dioxide. this oxidises the NAD to be reused in glycolysis and ensure more ATP is continued to be produced

how effective is aerobic respiration?

around 32%

what’s making aerobic respiration not 100% efficient?

• protons leaking across the mitochondrial membrane during oxidative phosphorylation

• ATP is being used to actively transport pyruvate and NADH into the matrix

• some energy is lost as heat

why is anaerobic respiration less efficient then aerobic?

only ATP molecules are produced from one glucose molecule