What are 2 ways viruses can reproduce?
There are two processes used by viruses to replicate: the lytic cycle and lysogenic cycle. Some viruses reproduce using both methods, while others only use the lytic cycle. In the lytic cycle, the virus attaches to the host cell and injects its DNA.
How virus is created?
Viruses may have arisen from mobile genetic elements that gained the ability to move between cells. They may be descendants of previously free-living organisms that adapted a parasitic replication strategy. Perhaps viruses existed before, and led to the evolution of, cellular life.
Where do viruses multiply?
Viral production / replication. Viruses multiply only in living cells. The host cell must provide the energy and synthetic machinery and the low molecular-weight precursors for the synthesis of viral proteins and nucleic acids.
Are viruses a form of life?
Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things.
Why Do Viruses want to multiply?
For viruses to multiply, they usually need support of the cells they infect. Only in their host´s nucleus can they find the machines, proteins, and building blocks with which they can copy their genetic material before infecting other cells. To do so, they carry the necessary “machinery” with them.
What do both bacteria and viruses have in common?
Although they have a number of differences, bacteria and viruses have a number of similarities. These include: Lack membrane-bound organelles – While bacteria have a few organelles involves in metabolism and reproduction, they, like viruses, do not have membrane-bound organelles.
What are the similarities and differences between viruses and cells?
Viruses are non-living infectious particles, much smaller than a cell, and need a living host to reproduce. The genetic material of the cell is DNA, a double stranded helix. Viruses however, can use DNA in a double or single strand, as well as RNA in a double or single strand.
What type of cell is virus?
Because they can’t reproduce by themselves (without a host), viruses are not considered living. Nor do viruses have cells: they’re very small, much smaller than the cells of living things, and are basically just packages of nucleic acid and protein.
What is the difference between a DNA and RNA virus?
DNA viruses are mostly double-stranded while RNA viruses are single-stranded. RNA mutation rate is higher than the DNA mutation rate. DNA replication takes place in the nucleus while RNA replication takes place in the cytoplasm. DNA viruses are stable while RNA viruses are unstable.