Bacteriophage Tobacco Mosaic Virus Can nitrifying bacteria synthesize proteins why

Both, but the first two are not the same as the third.

Bacteriophages are DNA viruses that need to be synthesized after invading bacterial cells. (Specifically: DNA is replicated, then transcribed into mRNA, and then proteins are translated.) )

Tobacco mosaic virus is an RNA virus, which invades bacteria and reverses RNA into DNA, then replicates DNA, then transcribes it into mRNA, and then translates proteins.

Viruses are made up of proteins (capsids) and nucleic acids inside] nitrifying bacteria can of course synthesize proteins. It belongs to chemoautotrophic organisms.

Both of them can synthesize proteins.

Bacteriophage. Tobacco mosaic virus is a virus, they themselves can not carry out life activities, but after they invade the cell, the phage specifically invades the bacterial cell, the tobacco mosaic virus invades the plant cell, the virus injects its own RNA into the nucleus of the cell (not for bacteria, bacteria do not have a nucleus), the RNA of the virus here controls the host cell to synthesize proteins to complete its own life activities.

Nitrifying bacteria are able to synthesize the proteins they need on their own.

Bacteriophages can't synthesize proteins on their own, so they want to enter the host cell and infect them, inject their own DNA, and then use the host cell's raw materials to synthesize their own essential proteins.

The genetic material of tobacco mosaic virus is RNA, which is an RNA virus that first encodes DNA through reverse transcription, then undergoes a series of transcriptions and translations, and finally synthesizes proteins.

Of course, nitrifying bacteria can synthesize proteins on their own, and multicellular organisms can do it.

Only cellular organisms can carry out life activities independently.

Viruses have no cell structure and cannot carry out life activities independently, bacteriophages and tobacco mosaic viruses are viruses and cannot synthesize proteins by themselves;

All organisms with genes can synthesize proteins! Protein synthesis is a vital sign.

Agree with scjazf, tonylnf is wrong, tobacco mosaic virus is not retrovirus.

To be precise, except for the tobacco mosaic virus, which is RNA, the genetic material of the rest is DNA. But the nucleic acid of tobacco mosaic virus is only RNA, the nucleic acid of bacteriophage is only DNA, and the nucleic acid of several other types of nucleic acid is DNA and RNA. That is, tobacco mosaic virus contains 4 kinds of ribonucleotides, bacteriophages have 4 kinds of deoxyribonucleotides, and the rest contain 8 kinds of nucleotides.

Tobacco mosaic virus: 4 RNA viruses.

Bacteriophage: 4 DNA species.

Tobacco: The genetic material is DNA, there are 8 kinds of RNA (the same below), 8 kinds of yeast: 8 kinds of DNA.

Nitrifying bacteria: 8 species of DNA.

Human body: 8 kinds of DNA.

Tobacco mosaic virus RNA

Bacteriophage, RNA or DNA tobacco, RNA + DNA yeast, RNA + DNA nitrifying bacteria, RNA + DNA human RNA + DNA

Organisms without a formed nucleus and organisms without a cell structure are: 2 nitrifying bacteria and bacteriophage viruses.

1. Escherichia coli and bluestool algae both have a cell structure and do not have a formed nucleus 2. Nitrifying bacteria do not have a forming nucleus, and bacteriophage viruses have no cell structure.

3. Lactic acid bacteria do not have a forming nucleus, while yeast has a forming nucleus.

4. Penicillium has a nucleus of eucalyptus, while tobacco mosaic virus has no cell structure.

a. All organisms in nature have nucleic acids, a is correct;

b. Tobacco mosaic virus and bacteriophage are viruses and have no chromosomes, cyanobacteria and E. coli are prokaryotes and do not contain chromosomes, B is wrong;

C. Tobacco mosaic virus is an RNA virus, which does not contain DNA, and C is wrong;

d. Tobacco mosaic virus and bacteriophage are viruses and have no cell structure

Answer: Respect the early paragraph] a

Answer analysis] Test question analysis: The nucleic acid of bacteriophages is DNA, and there are four types of bases; The nucleic acids of yeast include DNA and RNA, and there are five base species; The nucleic acid of tobacco mosaic virus is RNA, and there are four base species, A is correct.

Test center: This question tests the knowledge of nucleic acids. It is intended to test the ability to understand the key points of knowledge learned and grasp the internal connections between knowledge.

a. Substances contained in bacteriophages, tobacco mosaic virus, yeast and cyanobacteria; a. Correct;

b. The cell membrane is the cell structure of the cell structure, and the bacteriophage and tobacco mosaic virus do not have the cell membrane, B is wrong;

c. Chromosomes are substances that yeasts have, and bacteriophages, tobacco mosaic virus, and cyanobacteria do not have chromosomes, and C is wrong;

D. DNA is a nucleic acid possessed by bacteriophages, yeasts, and cyanobacteria, and tobacco mosaic virus is an RNA virus, which does not have DNA, and D is wrong

Therefore, a

Answer] A Answer Analysis] Test Question Analysis: Bacteriophages and tobacco mosaic disease are viruses that have no cell structure and no chromosomes, and are formed by nucleic acids and proteins. Yeasts belong to eukaryotic organisms and have nucleic acids, cell membranes, chromosomes, etc.; Cyanobacteria belong to prokaryotes and have nucleic acids, cell membranes, and no chromosomes.

So they all contain nucleic acids. Therefore a is correct.

Test point: The structure of cells and the genetic material of organisms.

Comments: This question is easy and requires students to memorize the structure of common organisms and their genetic material.