respiratory substrates

Question 1

defenition

Answer 1

any biological mol that can be oxidised in respiration to release energy for ATP synthesis

Question 1

when is amino acid used

Answer 1

only when carbohydrates and lipids are low

Question 2

how is amino acid used

Answer 2

protein hydrolysed to amino acid, deamination remove amino group
keto acid enters at krebs cycle

Question 3

end product of using amino acid as respiratory substrates

Answer 3

keto acid

Question 4

where does keto acid (amino acids) enter

Answer 4

at krebs cycle

Question 5

why does lipids give more energy per gram

Answer 5

fatty acids contain high C-H bond producign more NADH + FADH per gram

increases ATP yield via oxidative phosphorylation

Question 6

lipids as a respiratory substrate

Answer 6

lipids hydrolysed to glycerol + fatty acids

glycerol converted to triose phosphate and enters glycolysis
fatty acids undergo oxidation to small 2c acetate
combine with CoA forms acteyl CoA and enters krebs cycel