Questions about DNA, conjectures about the origin of DNA

It is now believed that 90% of the DNA of eukaryotes is garbage, that is, it has no effect, can be copied and transcribed but cannot be translated into proteins, and introns are to be cut off during post-transcriptional processing! But prokaryotes have much less DNA than the proteins involved in translation in eukaryotic DNA. So the DNA of eukaryotes can store more genetic information than the DNA of prokaryotes!

Basic molecular biology is actually not difficult, and I guess you will feel the same after reading the book a few times!!

The main thing is that introns affect the expression of genes......

First of all, the DNA content of prokaryotes is much less than that of eukaryotes. And eukaryotes have a protein coating on the outside of their DNA, but prokaryotes are nude. The endofuncton exons of prokaryotes do not participate in transcription and replication.

To put it simply, eukaryotes evolved from prokaryotes, so"Advanced"The product should always be more functional and meet the needs of adapting to the future environment.

Exons can transcribe proteins.

Isn't it written very clearly in biology books, read it for yourself.

It's DNA.

Most of life on earth is based on DNA to store genetic information and control life activities, and a few are RNA.

Conjecture 1: The original earth, the temperature was very high, and the earth was like a container for atoms to build compounds, which were originally inorganic compounds, water molecules, and inorganic salt ions. The four elements of CHON on the earth are relatively abundant, and they can carry out organic chemical reactions to generate the initial CH4, and then carry out various redox reactions to generate some alcohols, aldehydes, ketones, organic acids, etc.

The generation of organic compounds starts with the simplest ribose, glucose, amino acids.

At that time, the earth should have been a pot of sugar water. Under suitable conditions, amino acids begin to polymerize and transform into some polypeptides, and under the interaction of some external forces and molecules, polypeptides form a certain spatial structure of group beats (the key to origin is to find the most primitive protein), forming the original and most primitive protein. The production of proteins allows organic compounds to achieve more directional transformations.

Five-carbon sugar, phosphoric acid, and nitrogenous bases form the initial nucleo-initiated glyconucleotide, which is then polymerized to form the most primitive RNA, and a ribonucleotide (AMP) is converted to ADP and ATP. Such a shift led to an internal law in which the compounds of the primordial ocean produced an internal law that the whole ocean was like what we now call a cell, which was a large cell.

But there are no signs of life yet. The manifestation of life activity begins with a protein, which at first begins to capture other organic compounds and transform them, perhaps it is the most primitive virus, a protein virus. Some of this virus began to capture RNA and bind to it, in the sense that this is the most primitive ribosome.

The appearance of ribosomes begins to show its abilities. At the same time, some small RNAs can be trapped in binding to amino acids. The first life begins with translation, the synthesis of many different proteins.

At the same time, the RNA is getting longer and longer. Proteins and RNA were combined again to form the most primitive RNA virus.

There is no competition between RNA viruses, everything is sufficient.