Question by  lindotext (24)

How many amino acids exist?


Answer by  JelenaMandic (64)

In chemical terms, amino acids are compounds containing amino group (-NH2) and carboxyl group (-COOH). Their composition includes the following elements such as C, H, N and O. The composition of the human body enters a total of 20 amino acids. 10 of them can be built into the body, while the remaining 10 must be entered through the food.


Answer by  G12345 (1808)

There are 13 non essential amino acids in humans: alanine, aspagrgine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, Selenocysteine, serine, tyrosine, arginine and histidine. There are eight essential amino acids in humans: Isoleucine, leucine, Methionine, lysine, Threonine, phenoalanine, Tryptophan aan valine. They all have the same basic structure just with different side arms.


Answer by  dsmith42 (371)

There are 22 standard amino acids. These amino acids are the ones that are found in all life on earth. However, there can be many more types that do not naturally occur on earth.


Answer by  supinps (65)

Along with the naturally occuring standard 22 amino acids, numerous non-standard amino acids are there.Amino acids are the organic compounds which contains amine group NH2. These amino acids forms chains, shorter chains forms peptides while a longer chain forms polypeptide or protein which are the building blocks of life. They are critical to life


Answer by  mazultav (5)

There are 22 amino acids. 20 of which are encoded by genes. Eight of the amino acids are essential to humans and must be taken in with food.


Answer by  littleamy85 (184)

There are about 22 standard amino acids that exist 8 of them are essential and need to be obtained from food since the body can't make them and 15 of them are nonessential.


Answer by  mooly398 (140)

There are 22 amino acids found in the human body, 20 of which are included in the universal genetic code. There are huge numbers of non-standard amino acids as well.


Answer by  Azmeth (15)

there are 20 standard amino acids. alanine, arginine, asparagine, aspartic, cysteine, glutamine, glutamic acid, glycine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, valine


Answer by  Anonymous

There are about 500 different amino acids on earth, but only 20 are used in all biological life known on earth.

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