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Difference between T-phages and λ-phages 1 Criteria Virulence T-phages They are virulent phage virus 2 Reproductive Cycle They are lytic cycle operators 3 Tail fibril 4 5 Sheath Presence and activity of repressor 6 long tail fibrils present at the tail plate Sheathed tail is present λ-repressor protein is produced by the activity of the cI gene 6 Prophage development Prophage development does not take place at all 7 Help in transduction 8 9 Stability of the ghost particle Amount of proteins 10 Length of the life Cycle Length of the life cycle is shorter therefor the Eclipse phage is shorter in length 11 Use as an agent 12 Mutation of the host 13 Image Due to lack of the capacity to bind with the host genome they are not used in genetically engineering rather they are used is page therapy Doesn’t capable of mutant host formation Helps in generalized transduction of bacteria Attached with stability The variety of viral proteins are much higher in number λ-phages They are a-virulent or nonvirulent phage virus They are lysogenic cycle operators Only 1 tail fibril present Tail is unsheathed λ-repressor is not produced activity of the cro-proteins restricts the λ-repressor Prophage formation takes place because of the sticky end on the bacterial genome Helps in specialized transduction of bacteria Attached loosely The viral proteins are present here in lesser amount in term of variety Length of the life cycle is greater and therefor the length of the Eclipse period is greater Used as vector in gene manipulation and other scientific experiments They are capable of mutant host formation Difference between TMV and Phage virus 1 2 3 Criteria Virus Type Nucleic acid Reproduction 4 Transmission 5 Translocation 6 Parts 7 Disturbance of the host cell cycle 8 Mutation of host 9 Amount of proteins 10 Own enzyme 11 12 Size Image TMV Phage virus Bacteriophage dsDNA Lytic or lysogenic cycle operators Microscopic transmission Plant Virus ssRNA RNA dependent RNA polymerization Physical or vegetative transmission Cell to Cell plasmodesmatal translocation is present Only protein cote and nucleic acid Slightly disturbed Capacity to mutate the host is absent Varity of proteins are less in number, only 4 types of proteins are present Doesn’t possess their own enzyme 300nm-17nm No such translocation only translocate to neighboring cells in culture Head, Collar, Tale, Tale plate, Tale fibril, Spikes Completely disturbed and completely taken over by the viral genome They have capacity to mutate the host Thousands of proteins present Some members carry their own enzymes 9.5nm-6.5nm Titas Mallick http://botanytitasmallick.lixter.com https://titasmallick.zz.mu