Arginine, leucine, and lysine are all essential amino acids. This means that they are (pick one correct
1 the main intermediates to the urea cycle.
2 only available from a person's diet.
3 not needed for a body to function.
4 produced from other intermediates.
I know essential amino acids can only be obtain from diets but arginine can also be generated from urea cycle, so I'm not sure that's the correct answer
correct answer is 2 only available from a person's diet. According to the definition of essential amino acids, they must be... View the full answer