Does all cellular genetic material have to be DNA?

I'll give you four words, and you'll know.

The genetic material of all living things is nucleic acids (DNA and RNA)2 only DNA is the genetic material of living organisms: DNA (e.g., eukaryotes, prokaryotes, DNA viruses).

3 Only RNA biological genetic material: RNA (such as RNA virus (HIV virus, that is, AIDS)).

4. DNA-freeRNA-free biological genetic material: proteins (e.g., prions).

DNA is the main genetic material, so there is nothing wrong with saying that RNA is genetic material.

No, DNA is not the genetic material of all living things.

If you want to add a definite sentence to this sentence, that's right. To put it this way:

DNA is all".Cell classes"The genetic material of living beings.

That is, as long as it is a cellular organism, its genetic material is DNA.

In addition to cellular organisms, there are also non-cellular organisms, which are viral organisms. Virions do not have a cellular structure.

The genetic material of most viral organisms is also DNA, and the genetic material of a few viruses is RNA

No, the genetic material of some organisms is RNA, such as viruses, which are a special organism composed of protein shells and RNA genetic material, and it is precisely because its genetic material is RNA that it has strong variability, so many viruses do not have vaccines, such as viruses that cause colds.

I asked the biology teacher about this, but this one shouldn't be.

No. Genetic material is the material that controls heredity.

The genetic material of everything with a cellular structure is DNA, whether eukaryotic or prokaryotic, but viruses have exceptions: most viruses are DNA, and only a small amount of viral genetic material is RNA, for example, AIDS, tobacco mosaic virus, etc.

Also note: Eukaryotes do contain RNA, but it is not genetic material.

Because most organisms use DNA as their genetic material, it is said that DNA is the main genetic material.

DNA: The genetic material of the vast majority of organisms is DNA

RNA: A few viruses (e.g., SARS virus, AIDS virus, influenza virus, tobacco mosaic virus, plantain virus).

The biological kingdom is that the genetic material of the vast majority of organisms is DNA, and only a few viruses have the genetic material of RNA.

The law can be summarized: where there are cell structures and organisms, their genetic material must be DNA, and the genetic material of viruses may be both DNA and RNA, but there are few examples of RNA viruses, such as influenza virus, tobacco mosaic virus, and HIV.

The genetic material of a small number of viruses is RNA, and the genetic material of other organisms is DNA

The core "high school biology" DNA is selected to summarize the main genetic material knowledge points.

1.Organisms can be divided into two main groups: organisms with cellular structures (including eukaryotes and prokaryotes) and organisms with cellless structures (i.e., viruses).

2.Organisms with cellular structures have two types of nucleic acids, DNA and RNA, and when DNA and RNA are present at the same time, DNA is the genetic material. So the genetic material of both eukaryotes and prokaryotes is DNA.

3.Viruses can be divided into DNA viruses and RNA viruses. The genetic material of a DNA virus is DNA, and the genetic material of an RNA virus is RNA. And there are more DNA viruses than RNA viruses, and only a very small number are RNA viruses.

Summary: Only a very small number of viruses have RNA, and the vast majority of viruses and other organisms have DNA. So DNA is the main genetic material.

It's very complete, and I hope it will be adopted.

Bottom line: Because most organisms use DNA as their genetic material, and only a very small number of viruses or virus-like genetic materials are RNA, DNA is the main genetic material in the biological world.

The core "high school biology" DNA is selected to summarize the main genetic material knowledge points.

Because the genetic material of the vast majority of organisms is DNA, and the genetic material of a few organisms is RNA. Genetic material is 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.

The nature of genetic material

Definition: The material that transmits genetic information between parents and offspring.

Chemical nature: Except for some viruses whose genetic material is RNA and prions, which are proteins, the genetic material of the rest of the viruses and all organisms with typical cellular structures is DNA.

Site of presence: This substance is the main component of chromosomes. It is also found in organelles like plastids, mitochondria, etc., outside the nucleus.

Basic characteristics: Relative stability, self-replication, precursor maintain a certain degree of continuity and produce heritable variation.

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.

The following is the most accurate explanation of why DNA is the primary genetic material ( ).

a.Scientific experiments have proved that in animal and plant cells, DNA controls the main traits of organisms.

b.The genetic material of all living things is DNA

c.The genetic material of most organisms in the world is DNA, and the genetic material of a very small number of organisms is not DNA

d.The chemical components of chromosomes mainly include proteins and DNA, and DNA plays a very important role in the process of propagation and succession of organisms.

Answer: C solution: A. There are multiple genes on a DNA, and a specific trait of an organism is controlled by genes, and the gene is the smallest unit that determines the trait of a biological, and A is wrong;

b. The genetic material of most viruses is DNA, and the genetic material of a few viruses is RNA. Viruses are divided into DNA viruses, RNA viruses, and Ruan viruses For example, the genetic material of bacteriophage virus is DNA, while the genetic material of tobacco mosaic virus is RNA, B error;

c. The genetic material of most organisms in the world is DNA, and the genetic material of a very small number of organisms is not DNA, for example, the genetic material of most viruses is DNA, and the genetic material of a few viruses is RNA, C is correct;

d. Chromosomes exist in the nucleus, DNA and proteins constitute chromosomes, DNA is the carrier of genetic information, is the main genetic material; Fragments of DNA molecules with specific genetic information are genes, and genes control the traits of organisms, but the genetic material of a few viruses is RNA. The genetic material RNA also plays an important role in the propagation process of organisms.

It took 24 years from Griffiths's transformation experiment with Pneumococcus in 1928, to Avery's experiment in 1944, and then to the phage infection experiment of Pechang Hershey and Chase in 1952, before people were convinced that DNA was genetic material.

Later studies proved that the genetic material includes RNA in addition to DNA. Some viruses do not contain DNA and only protein and RNA, such as tobacco mosaic virus. The proteins extracted from the tobacco mosaic virus cannot infect tobacco with the virus, but the RNA extracted from these viruses can infect tobacco with the repentance virus.

So, in these viruses, RNA is the genetic material. Because the genetic material of the vast majority of organisms is DNA, it is said that DNA is the main genetic material.