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DNA may be integrated in the hosts nucleic acid inducing specialized transduction and phage conversion in the future (Tortora, Fnke & Case, 2010). Tis results to a provirus that allows infected cells to function normally for some time. Te cycle involves the production of repressor proteins, wich in spontaneous occasions may fail, mking the virus to enter the lytic cycle. Vruses act as co-carcinogens, i that they propagate cancer progression. I some cases, tey cause cancer, tough pathology results after a long time. I is said that 10% tumors result from viral infections.

Acase example is papilomavirus, wich normally causes benign warts on human skin with an incubation period of some weeks. HV (Human papilomavirus) has more than 60 serotypes with serotypes 11 and 6 being common for genital warts, wich are benign. Hwever, srotypes 18 and 16 are carcinogenic and cause penile, oal anal and cervical cancers as according to Tortora, Fnke and Case (2010). HV is thus an oncogenic virus. Te cancer results following the mixing of host cell DNA and viral DNA instigating changes growth and cellular multiplication cycles.

Te results are altered proteins that allow hyperplasia and ultimately cancer. A such, i is advisable to take the HPV vaccine as a measure of avoiding cervical, pnile and oral anal cancers in contemporary medicine. Potozoa are unicellular organelles, wth a 3-10 micron size; tey do not have organs, tssues and layers but have intracellular organelles with various specializations. Mst of them are naked with a few having exoskeletons, tey have multiple symmetry including spherical, rdial, blateral and even in some cases, aymmetrical Fnke Case, 2010).

I addition, tey move via cilia, fagella or pseudopodia and can be mutualistic, prasitic, cmmensal or free living. Potozoa in this category use flagella, peudopodia or a combination of the two for locomotion. Tey have monomorphic nuclei. Eamples are Arcella and Amoeba genera. Te latter are naked and lack a test while the former have a calcareous test. Tey move using flagella, wich can be one or two, hve monomorphic nuclei. Tey have chloroplasts hence photosynthesize just as green plants. Tey are characterized into two knetoplasta and Te latter are plant like organisms that photosynthesize in solitude while the former are heterotrophic, prasitic and non-photosynthetic.

Oganisms have two nuclei: ...

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