In: Biology
Imagine that you are studying the metabolism of a baby who is feeding on breast milk. You are going to compare the catabolism of two molecules of galactose from the lactose in milk with the catabolism of two molecules of leucine from the casein of milk.
1. Detail the catabolic path * for the molecules until their final oxidation in CO2 + urea.
2. It includes all the reactions that are carried out and the enzymes that they catalyze.
3. Include the molecular structure and the name of all the intermediaries.
4. All of them must be intertwined. Use different colors for reactions that are (a) only from galactose catabolism (b) only from leucine catabolism and (3) common to both.
5. Finally, detail the net ATP gain from the complete oxidation of each of the molecules. (Include payment for making the urea molecule.)
Answer:
galactose
undergoes degradation to form pyruvic
acid:
Now
pyruvic acid will enter in the urea cycle to for Urea.Therefore
complete degradation of galactose will take
place.
Now
let us discuss catabolism of Leucine:
Now
Succinyl CoA (Degradation product of leucine) will enter in the TCA
cycle to generate oxaloacetate.In the figure given below kindly
consider reactions from conversion of succinyl CoA to oxaloacetate.
Please avoid other reactions.
The
oxaloacetate formed will be enter in the urea cycle for complete
catabolysis:
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