- Are viruses living?
- Which plant virus has DNA?
- What is the smallest RNA virus?
- Are viruses in the animal kingdom?
- Can a plant have a virus?
- Do viruses have DNA?
- What are viruses made of?
- Which is the smallest plant virus?
- How many plant viruses are there?
- Is variegation a virus?
- What is the most complex virus?
- Which is the largest animal virus?
- Can viruses live in plants?
- Can bacteria be infected by viruses?
- Which of the following is largest virus?
Are viruses living?
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..
Which plant virus has DNA?
The best known member of this group, the cauliflower mosaic virus, was the first plant virus found to contain DNA (104). About a half-dozen similar viruses are known, allof which contain double-stranded DNA. The second group of DNA viruses is exemplified by bean golden mosaic with single-stranded DNA (37, 38).
What is the smallest RNA virus?
The smallest RNA viruses in terms of genome size are small retroviruses such as rous sarcoma virus with genomes of 3.5 kilo base pairs (kb) and particle diameters of 80 nanometres (nm).
Are viruses in the animal kingdom?
Viruses occupy a special taxonomic position: they are not plants, animals, or prokaryotic bacteria (single-cell organisms without defined nuclei), and they are generally placed in their own kingdom. … In virtually all viruses, at least one of these proteins forms a shell (called a capsid) around the nucleic acid.
Can a plant have a virus?
Plant viruses are viruses that affect plants. Like all other viruses, plant viruses are obligate intracellular parasites that do not have the molecular machinery to replicate without a host. Plant viruses can be pathogenic to higher plants.
Do viruses have DNA?
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.
What are viruses made of?
A virus is made up of a core of genetic material, either DNA or RNA, surrounded by a protective coat called a capsid which is made up of protein. Sometimes the capsid is surrounded by an additional spikey coat called the envelope.
Which is the smallest plant virus?
tabaco necrosis satellite virusThe smallest plant virus to date is the tabaco necrosis satellite virus that is only 18 nanometers wide. It was the first virus to be recognized as a satellite virus. A satellite virus needs a helper virus in order to replicate in its host and has an icosahedral shape.
How many plant viruses are there?
Since then, a large number of diverse viruses have been found in plants, animals, fungi, and bacteria. The current estimate of recognized viruses is approaching 4,000, of which about 1,000 are plant viruses. The main reason that we study plant viruses is the negative impact that viral diseases have on crop production.
Is variegation a virus?
Viral Variegation Some variegated leaves are actually caused by viruses, such as the Mosaic virus. Though not super common, sometimes the resulting variegation from a virus is desirable and can be reproduced.
What is the most complex virus?
CytomegalovirusCytomegalovirus – or CMV – is the most complex virus known to man. Most people will in their lives become infected by CMV and, because it is a herpes virus, infection lasts a lifetime.
Which is the largest animal virus?
parrot fever viruslargest animal virus is the parrot fever virus.
Can viruses live in plants?
Numerous viruses infect plant, however, none of them so far is known as pathogen to animal and human beings. Only three families, Bunyaviridae, Rhabdoviridae and Reoviridae contain viruses known to infect plant, animal and human.
Can bacteria be infected by viruses?
Well known viruses, such as the flu virus, attack human hosts, while viruses such as the tobacco mosaic virus infect plant hosts. More common, but less understood, are cases of viruses infecting bacteria known as bacteriophages, or phages.
Which of the following is largest virus?
pox virusThe largest virus is the pox virus, around 250 to 300 microns. The infectious viral particles have the enzymes required for replication within the virion and hence, the virus has a large size. These viruses are different from other viruses in their ability to replicate inside the infected cytoplasm independently.