Contents
Do viruses contain all nucleic acids?
2. A distinguishing characteristic of viruses is that they contain only one type of nucleic acid. This feature is the basis of virus classification. The viral genome (all chromosomes) contains a DNA or RNA structure.
How many types of nucleic acids are there in viruses?
Nucleic acids (viral genome), which make up the genetic structures of viruses, consist of only one of deoxyribonucleic acid (DNA) or ribonucleic acid (RNA). In other words, there is only one DNA or RNA in the virion and not both.
Do viruses have nuclei?
They lack nuclei, organelles and cytoplasm. They are obligate intracellular parasites. They can reproduce only in a living cell.
In what environment does the virus multiply?
The virus, which means poison in Latin, cannot reproduce in an inanimate environment. They absolutely need a living structure to reproduce and maintain their existence. They reproduce using the organelles of the infected cell.
Does the virus contain only one type of nucleic acid?
Viruses are generally infectious agents that can pass through submicroscopic filters containing bacteria, contain a single type of nucleic acid, and contain a protein envelope.
How many viruses do they divide into?
I: ciDNA virus (eg, adenovirus, herpes virus, poxvirus) II: tiDNA virus (+ strand or “directed”) DNA (eg, parvovirus) III: ciRNA virus (eg, reovirus) IV: (+)tiRNA virus (+-strand) or “directed”) RNA (e.g. Picornavirus, Togavirus)
Do all viruses contain nucleic acids and proteins?
Nucleic acids are made from either DNA (single/double-stranded) or RNA (single/double-stranded) is made up of double-stranded RNA. DNA and RNA do not exist together. In the innermost part, we find the nucleic acid and the capsid (sheath) that surrounds it, protects it and gives it its morphology. All viruses encode their own capsid proteins.
In which environment are viruses not produced?
The maternal antibodies contained in the egg yolk can inhibit the reproduction of viruses. Thus, in viral studies (isolation, production of vaccines, etc.), preference should be given to eggs without maternal antibodies.
Why is the ribosome found in all cells?
Many ribosomes are present in all cells, including bacteria. However, it should be noted that this is an organelle not found in viruses. It is responsible for protein synthesis in the cell. They are structures that are attached to the cell membrane and the endoplasmic reticulum.
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