Part one of term paper
? Viruses have been defined as "entities whose genomes are elements of nucleic acid that replicate inside living cells using the cellular synthetic machinery, and cause the synthesis of specialised elements that can transfer the genome to other cells." They are stationaryand are unable to grow. Because of all these factors, it is debatable ...

Part two of term paper
... The nucleic acid core is composed of either DNA or in the case of retroviruses, RNA, but never both. In retroviruses, the RNA gets transcribed to DNA bye the enzyme reverse transcriptase. The protein capsid is a protein layer that wraps around the virus. There are four basic shapes of viruses. The tobacco mosiac, adenovirus, influenza virus, and t-even bacteriophage are each examples of a different virus structure. Each individual protein subunit composing the capsid is a capsomere. ...