Amino acid molecules about proteins

The amino acids that make up proteins in nature are all amino acids. That is, the amino acid has at least one amino and carboxyl group linked to the same carbon atom (i.e., the academic bit).

The only amino group and the only carboxyl group in the structural formula of option d amino acids in the figure are clearly not linked to the same carbon atom.

To determine whether a substance is an amino acid, according to the characteristics: 1. At least one amino group (-NH2) and one carboxyl group (-COOH); 2. This amino group and this carboxyl group are attached to the same carbon atom, that is: NH2-C-Cooh

3. In addition, connect an H and an R group to the carbon atom in the middle.

Do you see if the amino group and the carboxyl group are connected to the same carbon atom in d? NH2-C-Cooh like this can say that the amino and carboxyl groups are attached to the same carbon atom.

-NH2 and -COOH of the D term are not attached to the same carbon atom, so they are not amino acids that make up proteins. And BC both.

The amino and carboxyl groups of d in the figure are not on the same carbon. Only amino and carboxyl groups attached to the same carbon atom are naturally produced amino acids, that is, amino acids that the human body needs to synthesize proteins. Two groups are not on the same carbon at the same time are also amino acids, but synthesized, chemically mentioned.

Not counted in living things. At least high school biology doesn't count it as an amino acid.

The amino and carboxyl groups are not attached to the same carbon atom, and there are three C's in between.

Summary. The elements composed of amino acids and proteins are definitely the same, because they are originally the same **, both of which are composed of 4 elements: carbon, hydrogen, oxygen and nitrogen. Elements can only describe the composition of a molecule, not the molecule as a whole.

On the question of high school biological proteins and amino acids, aren't amino acids and proteins molecules? Why do I see that sometimes it is described as being composed of four elements, can the elements describe the molecule?

Hello, amino acids are the basic structural units that make up proteins. The molecule you are talking about should be biological macromolecules, only proteins are biological macromolecules, and amino acids are not. You can imagine that there are many amino acids that make up a protein, a small circle represents the amino acid, and then many small circles come together and eventually become a large circle to represent the protein.

The elements composed of amino acids and proteins are definitely the same, because they are originally the same **, both of which are composed of 4 elements: carbon, hydrogen, oxygen and nitrogen. Elements can only describe the composition of a molecule, not the molecule as a whole.

Amino acids and amino acid molecules, proteins and protein molecules are not the same descriptions.

Hello, in many academic places, it is said that molecules, in fact, amino acids cannot be called molecules. What you say is the same, and you are describing the same substance.

Amino acids are only the basic units that make up proteins, and proteins are the real biological macromolecules.

Isn't it true that elements can't be used to describe molecules, so why sometimes I see some of the described proteins or amino acids that are made up of several elements.

Hello an element is a component of a substance, you can understand it in this way, you can divide a substance into various elements, and then what type of elements is it made of. It can represent both molecules and substances that are not molecules.

And when you talk about protein and amino acids, you can also understand them as the same substance, one big and one small, but their constituent elements are the same.

a.That's right. b.Mistake.

Correct Answer: False.

Analysis: Essential amino acids refer to the amino acids that humans (or mammals) cannot synthesize by themselves and are essential for the body, including 8 kinds of amino acids. Other amino acids can be synthesized by the body itself and are called non-essential amino acids.

Answer]: C amino acid classification (by physiological function).

1) Raw protein amino acids: 20 kinds of encoding amino acids.

2) Non-raw protein amino acids: amino acids that are not present in proteins. Such as: citrulline, ornithine, wheel deficiency homotype semi-forest cocystine. metabolic pathways.

3) Modified amino acids: amino acids produced by modification processing after protein synthesis. There is no corresponding encoding. Such as: cystine, hydroxyproline (HYP), hydroxylysine (HYP).