Advertisements
Advertisements
प्रश्न
Contagium vivum fluidum was proposed by ______.
विकल्प
D.J. Ivanowsky
M.W. Beijerinek
Stanley
Robert Hook
Advertisements
उत्तर
Contagium vivum fluidum was proposed by M.W. Beijerinek.
Explanation:
D.J. Ivanowsky (1892) discovered the virus and recognised certain microbes as the causal organisms of the mosaic disease of tobacco. M.W. Beijerinck (1898) demonstrated that the extract of the infected plants of tobacco could cause infection in healthy plants and called the fluid Contagium vivum fluidum (infectious living fluid). W. M. Stanley (1935) first time showed that viruses could be crystallised and crystals consist largely of proteins.
APPEARS IN
संबंधित प्रश्न
Give a brief account of viruses with respect to their structure and nature of genetic material. Also name four common viral diseases.
Organise a discussion in your class on the topic- Are viruses living or non-living?
Influenza is a _____ disease.
Complete the analogy.
Cholera : Bacteria :: Smallpox : _____
Mention any two viral diseases.
Match the following
| Swine flu | Human Papilloma virus |
| Genital warts | Human Immunodeficiency Virus |
| AIDS | Mycobacterium |
| Tuberculosis | Influeuza virus H1N1 |
Distinguish between Virion and Viroid.
Explain the various types of viruses with examples.
Which one of the following statement about virus is correct?
Which one of the following statement about virus is correct
______ can kill damage or change the cells and make you sick.
Complete the Analogy.
Polio: Virus:: Tetanus: ______.
Virus means ______ in Latin.
Adenovirus is ______ virus.
Virions are the smallest among the infective agents.
One of the differences between virus and viroid is the presence of protein coat in viroid and its absence in the virus.
Enumerate the living and non-living characters of viruses.
Viruses are non-cellular organisms but replicate themselves once they infect the host cell. To which of the following kingdom do viruses belong to?
A virus is considered as a living organism and an obligate parasite when inside a host cell. But virus is not classified along with bacteria or fungi. What are the characters of virus that are similar to non-living objects?
