- Do viruses have single or double stranded DNA?
- Are there any DNA viruses?
- Do archaea have viruses?
- Are viruses prokaryotes?
- Does double stranded RNA exist?
- Where do most DNA viruses replicate?
- What is the difference between double stranded RNA and DNA?
- Can viruses be double stranded?
- Do archaea have double stranded DNA?
- Why are DNA viruses more likely to cause neoplasias than are RNA viruses?
- Are viruses archaea or bacteria?
Do viruses have single or double stranded DNA?
DNA viruses are viruses that have DNA genomes and replicate using DNA-dependent DNA polymerase.
DNA viruses can be grouped into two classes, double-stranded (ds) DNA viruses and single-stranded (ss) DNA viruses..
Are there any DNA viruses?
Most viruses have either RNA or DNA as their genetic material. The nucleic acid may be single- or double-stranded. The entire infectious virus particle, called a virion, consists of the nucleic acid and an outer shell of protein. The simplest viruses contain only enough RNA or DNA to encode four proteins.
Do archaea have viruses?
Archaea can be infected by double-stranded DNA viruses that are unrelated to any other form of virus and have a variety of unusual shapes. … Although around 50 archaeal viruses are known, all but two have double stranded genomes; two groups of single-stranded DNA viruses that infect archaea have been recently isolated.
Are viruses prokaryotes?
Microorganisms and all other living organisms are classified as prokaryotes or eukaryotes. … Viruses are considered neither prokaryotes nor eukaryotes because they lack the characteristics of living things, except the ability to replicate (which they accomplish only in living cells).
Does double stranded RNA exist?
Double-stranded RNA (dsRNA) is RNA with two complementary strands, similar to the DNA found in all cells, but with the replacement of thymine by uracil. … Double-stranded RNA, such as viral RNA or siRNA, can trigger RNA interference in eukaryotes, as well as interferon response in vertebrates.
Where do most DNA viruses replicate?
Replication between viruses is greatly varied and depends on the type of genes involved in them. Most DNA viruses assemble in the nucleus while most RNA viruses develop solely in cytoplasm. Double-stranded DNA viruses usually must enter the host nucleus before they are able to replicate.
What is the difference between double stranded RNA and DNA?
Like DNA, RNA can form right-handed double helices. In contrast to DNA, RNA forms an A-form helix with a radius of ∼1.2 nm and a length increase per base pair of ∼2.8 Å, ∼20% wider and shorter than B-form dsDNA (Fig. 1A).
Can viruses be double stranded?
Double-stranded RNA (dsRNA) viruses infect practically all organisms, from bacteria to unicellular and/or multicellular simple eukaryotes (fungi, protozoa), through to plants and animals. Although dsRNA viruses are a rather diverse group, they share general architectural principles and numerous functional features.
Do archaea have double stranded DNA?
Very few viruses have been identified from Archaea as compared to Bacteria and Eukarya. … The sequence of the circular double-stranded DNA viral genome shows that it shares little similarity to other known genes in viruses or other organisms.
Why are DNA viruses more likely to cause neoplasias than are RNA viruses?
p. 395Why are DNA viruses more likely to cause neoplasias than are RNA viruses? DNA virus genomes are more likely to become integrated into the host genome, and insertion of foreign DNA can result in damage to host genes or regulatory structures, which may in turn result in the cell becoming pre-cancerous.
Are viruses archaea or bacteria?
The archaea-specific virosphere includes viruses that are currently classified into 12 families and 1 unassigned genus (Figure 1). These viruses display a combination of morphological and genomic features that is not observed among viruses infecting hosts in the other two cellular domains.