Non essential amino acids are not:
**Core Concept**
Non-essential amino acids are a group of amino acids that can be synthesized by the human body from other amino acids or intermediates of various metabolic pathways. They are called non-essential because they do not need to be obtained through the diet, unlike essential amino acids which must be obtained from external sources. The synthesis of non-essential amino acids involves various enzymes and metabolic pathways.
**Why the Correct Answer is Right**
The correct answer is that non-essential amino acids include alanine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. These amino acids can be synthesized by the body through various metabolic pathways, such as the transamination of alpha-keto acids, the transsulfuration of methionine, and the hydroxylation of phenylalanine. For example, aspartic acid is synthesized from oxaloacetate, a key intermediate in the citric acid cycle.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided.
* **Option B:** This option is not provided.
* **Option C:** This option is not provided.
**Clinical Pearl / High-Yield Fact**
It's essential to note that while non-essential amino acids can be synthesized by the body, their availability can be limited in certain situations, such as during rapid growth or in cases of malnutrition. In these situations, supplementation with non-essential amino acids may be necessary to support optimal physiological function.
**Correct Answer:** None of the above options are correct, as the question asks for a list of non-essential amino acids, which were not provided in the options.