Answer:
Neither is correct, since for example, Rachel says that the essential amino acids come from a mixture of complete and incomplete proteins and this is false, since the nine essential amino acids only come from complete proteins, incomplete proteins only have Some essential amino acids. Mark is also wrong, because although incomplete proteins do not contain all nine essential amino acids, a combination of those proteins could complete the requirement for dietary amino acids.
Explanation:
Complete proteins are those that have the nine essential amino acids. These proteins come from animal products such as meat, fish and eggs.
In the case of incomplete proteins they do not have all the essential amino acids. However, a complete protein can be achieved. All you have to do is combine different foods to add the essential amino acids. The source of these incomplete proteins are found in the plant world. A combination could be lentils with rice.
