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1) (3 pts) Name the α-keto acids formed by the transamination of the following amino acids

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1) (3 pts) Name the α-keto acids formed by the transamination of the following amino acids.
A. Tyrosine
B. Phenylalanine
C. Glutamine
D. Glutamate
E. Aspartate
F. Alanine

2. (3 pts) Name three enzymes that are likely the source of bicarbonate ion that is involved with the formation of carbamoyl phosphate?

3. (1 pt) In the Ubiquitin pathway, why are there many more E3 proteins than E1 and E2 combined?

4. (1 pt) In a dietary experiment you take away food from 20 white and brown rats for 18 hrs and then you place 10 white rats on normal fortified diets and 10 brown rats on a diet lacking only arginine. The brown rats have ammonia levels that increase 6-fold. Why?

(1 pt) Is Ariginine an essential amino acid in this species of rat? 

(1 pt) If you repeat the experiment and give the brown rats the same diet as before except that there is 
ornithine supplementation, you observe no spike in blood ammonia levels. Why?