- How do viruses multiply?
- Where do RNA viruses multiply?
- How does a virus destroy the host cell’s DNA?
- Do viruses live in cells?
- Why do viruses not have both DNA and RNA?
- What is DNA virus and RNA virus?
- Are viruses living?
- Do viruses reproduce on their own?
- What virus has DNA?
- Can viruses damage DNA?
- Are viruses created?
- Why can’t a virus reproduce on its own?
How do viruses 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..
Where do RNA viruses multiply?
Most DNA viruses assemble in the nucleus; most RNA viruses develop solely in cytoplasm. Viral populations do not grow through cell division, because they are acellular. Instead, they hijack the machinery and metabolism of a host cell to produce multiple copies of themselves, and they assemble inside the cell.
How does a virus destroy the host cell’s DNA?
A virus must use cell processes to replicate. The viral replication cycle can produce dramatic biochemical and structural changes in the host cell, which may cause cell damage. These changes, called cytopathic (causing cell damage) effects, can change cell functions or even destroy the cell.
Do viruses live in cells?
Contemporary research has revealed specific mechanisms viruses use to get inside cells and infect them. An individual viral particle, called a virion, is a far simpler structure than a bacterium. It has often been questioned whether a virus is alive. It is certainly not living in the everyday sense of the word.
Why do viruses not have both DNA and RNA?
viruses do have both DNA and RNA. … They are acellular i.e. they do not have cellular organization yet show some characters of living organisms (e.g they possess DNA). Viruses contain either RNA or DNA,normally encased in protein coat. They reproduce only in living cells, where they cause a number of diseases.
What is DNA virus and RNA virus?
DNA viruses contain usually double‐stranded DNA (dsDNA) and rarely single‐stranded DNA (ssDNA). These viruses replicate using DNA‐dependent DNA polymerase. RNA viruses have typically ssRNA, but may also contain dsRNA. … The genetic material of ssRNA(+) viruses is like mRNA and can be directly translated by the host cell.
Are viruses living?
So were they ever alive? Most biologists say no. Viruses are not made out of cells, they can’t keep themselves in a stable state, they don’t grow, and they can’t make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.
Do viruses reproduce on their own?
Viruses can only replicate themselves by infecting a host cell and therefore cannot reproduce on their own. … A primary reason is that viruses do not possess a cell membrane or metabolise on their own – characteristics of all living organisms.
What virus has DNA?
DNA viruses comprise important pathogens such as herpesviruses, smallpox viruses, adenoviruses, and papillomaviruses, among many others.
Can viruses damage DNA?
Numerous viruses introduce DNA damage and genetic instability in host cells during their lifecycles and some species also manipulate components of the DNA damage response (DDR), a complex and sophisticated series of cellular pathways that have evolved to detect and repair DNA lesions.
Are viruses created?
According to this hypothesis, viruses originated through a progressive process. Mobile genetic elements, pieces of genetic material capable of moving within a genome, gained the ability to exit one cell and enter another.
Why can’t a virus reproduce on its own?
“The virus cannot reproduce itself outside the host because it lacks the complicated machinery that a [host] cell possesses.” The host’s cellular machinery allows viruses to produce RNA from their DNA (a process calledtranscription) and to build proteins based on the instructions encoded in their RNA (a process called …