Which of the following phenomenon proves that viruses are living?
They carry metabolic activity
They carry anaerobic respiration
They multiply in host cells
They cause infection
Related Questions
Viruses did not find a place in classification since
They are not truely living
They are non-cellular
They are obligate parasite
They are pathogenic
The viruses are non cellular organisms that are charactarised by
Absence of Nucleic acid
An active structure outside the living cell
An inert crystalline structure outside the cell
Their hyper activity outside the cell
I. DJ Ivanowsky (1892) recognised certain microbes as causal organisms of the mosaic disease of tobacco
II. MW Beijerinck (1898) demonstrated that the extract of infected plants of tobacco could cause infection in healthy plants and called the fluid as contagium vivum fluidum
III. WM Stanley (1935) showed that these microbes could be crystallised and crystals consist largely of protein
The above statements are assigned to
Bacteria
Virus
Prions
Lichens
Identify the correct pair that shows the double stranded RNA among the following
(a) 5'-GAUCCG-3' and 3'-CUAGGC-5'
(b) 5'-GAUCCG-3' and 5'-CUAGGC-3'
(c) 5'-GAUCCG-3' and 3'-GAUCCG-5'
(d) 5'-GAUCCG-3' and 5'-GAUCCG-3'
Enzymes are absent in
Algae
Plants
Virus
Bacteria
Which of the following are correct to describe viruses?
I. Simple and unicellular organism.
II. Contain DNA or RNA and enclosed by protein coat.
III. Possess own metabolic system and respond to stimuli.
IV. Maintain genetic continuity and undergo mutations.
The correct combination is
I and II
II and IV
II and III
I and III
A virus differs from a bacterium as it contains
A cell wall
Cytosol
DNA as genetic material
DNA or RNA as genetic material with no ribosomes
Viruses are non-cellular organisms but replicate themselves once they infect the host cell. To which of the following kingdom viruses belong to?
Monera
Protista
Fungi
None of these
viruses Belong to kindom
Monera
Protista
Fungi
None of the above
Virus multiplies in
Soil
Dead tissue
Living tissue
Culture medium
