Tyrosine is listed as a non-essential amino acid because it can be synthesised from the essential amino acid phenylalanine.
<u>Explanation:</u>
Amino acids are classified as essential and non essential according to whether they can be synthesized in the body itself or should be supplied by the diet. Essential amino acids cannot be synthesized in the body of the organism and thus can be obtained only from the diet. In the case of human beings, valine, phenylalanine, methionine etc are examples of essential amino acids.
Non essential amino acids can be synthesized within the body of the organism. Thus they need not be supplied by the diet. Alanine, aspartic acid etc are some of the non essential amino acids in human beings. It is given here that animals cannot synthesize tyrosine from shikimate-3p due to the lack of EPSP synthase.
But the amino acid tyrosine can be synthesized from the amino acid phenylalanine which is an essential amino acid. Thus tyrosine will be a non-essential amino acid.
Answer:
Mycoplasma
Explanation:
Mycoplasma is the smallest cell
Answer: This energy comes from the food we eat. Our bodies digest the food we eat by mixing it with fluids in the stomach. When the stomach digests food, the carbohydrate in the food breaks down into another type of sugar, called glucose
The answer is diffusion
The process of diffusion requires a membrane that has pores to allow for gas and liquids to pass through.
