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Sometimes it's DNA, and only some RNA-only viruses have RNA's genetic material, and everything else is DNA
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RNA is single-stranded in structure. Ribonucleic acid (abbreviated as RNA, i.e., ribonucleicacid) is a genetic information carrier that exists in biological cells and some viruses and viroids. RNA is made up of ribonucleotides condensed by phosphodiester bonds to grow into chains.
A ribonucleotide molecule is made up of phosphoric acid, ribose sugar, and bases. There are 4 main bases of RNA, namely A (adenine), G (guanine), C (cytosine), and U (uracil), among which, U (uracil) replaces T in DNA. The role of ribonucleic acid in the body is mainly to guide the synthesis of proteins.
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RNA is the genetic material of certain viruses such as HIV, influenza virus, etc. Genetic material refers to the material that transmits genetic information between parents and offspring. With the exception of some viruses, the genetic material of the rest of the viruses and all organisms with typical cellular structures is DNA.
Because the vast majority of organisms contain DNA, the genes that control traits are in the DNA, and each cell of each organism contains a constant amount of DNA, which is very important for its inheritance responsibility, while the amount of RNA is uncertain.
When RNA exists independently, it is genetic material; When RNA and DNA are present at the same time, the genetic material of RNA is obscured and DNA acts as the genetic material.
Moreover, the genetic material of cellular organisms is all DNA, and only a few viruses have RNA genetic material, such as HIV virus, SARS virus, etc.
Conclusion: The genetic material of the vast majority of organisms (cellular structure organisms and DNA viruses) is DNA, so DNA is the main genetic material.
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First, many viruses do not have DNA and use RNA as the only carrier of genetic information.
Second, to put it simply, most organisms use DNA as the carrier of genetic information, and RNA translates the genetic information on DNA into protein heads.
RNA is mainly divided into three categories, namely TRNA**transport RNA), RNA (ribosomal RNA), mRNA (messenger RNA).mRNA is a template for the synthesis of proteins, and the content is transcribed according to the DNA in the nucleus; tRNA is the recognizer of the base sequence (i.e., the genetic codon) on the mRNA and the transporter of amino acids; RRNA, the component that makes up ribosomes, is the workplace of protein synthesis.
Somewhat similar to DNA is a software control system, RNA is a specific machine signal manufacturing product.
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