Viruses, Viroids, Prions and Lichens
Viruses, Viroids, Prions and Lichens: Overview
This topic covers concepts, such as, Lichens, Phycobiont, Mycobiont, Symbiotic Relationship, Viruses, Classification of Viruses, Tobacco Mosaic Virus, Bacteriophage, Viroids & Prions etc.
Important Questions on Viruses, Viroids, Prions and Lichens
Viroids have
Tobacco mosaic virus is a tubular filament of size
Which one of the following statements about viruses is correct?
Enzymes are absent in
Which one of the following is not true about lichens?
Interferons are –
Influenza virus has –
Lichens are well known combination of an alga and a fungus where fungus has –
Lichens indicate SO2 pollution because they –
Tobacco Mosaic Virus (TMV) genes are -
Assertion: Lichen is especially found on rock, bark or poor soil all over the world.
Reason: They can withstand the extremes in temperatures.
Algae and fungi exhibit symbiosis in _____ (lichen/virus).
Which of the following exhibits symbiosis?
Lichen exhibits symbiosis.
Genetic material of TMV is:
The tail part of a bacteriophage is a narrow cylindrical part that contains a hollow tube inside it which helps it to inject the DNA into the host.
The head of the bacteriophage has a protein coat called capsid which encloses a highly folded double-stranded DNA.
Bacteriophages are the viruses that infect the bacteria.
Name the following.
The Virus that has single-stranded RNA and lacks a protein coat.
Identify the correct statement/s about viruses.
