Viruses

1. DISEASES BY VIRUSES

1.1. Rabies, AIDS, mumps, hepatits, influenza and dengue are some examples of diseases.

1.2. The viruses are responsible for cancer in human beings and animals.

2. VIRION

2.1. It's and extracellular infectious particle of the virus.

2.2. Contains essential nucleic acid which is protected by a capsid.

2.2.1. The capsid is responsible to protect nucleic acid from nucleases and a lot of other factors too.

3. CHARACTERS

3.1. It doesn't have cellular organization;

3.2. Intracellular parasites (for its multiplication)

3.3. Nuclear material: DNA and RNA;

3.4. Depends on the host cell for its replication and multiplication;

3.5. Doens't have the essencial enzyme and the synthesis of nucleic acids;

3.6. Unaffected by antibiotics.

4. CURIOSITIES

4.1. It can be enveloped or non-enveloped.

4.1.1. Envelop is made up of lipoproteins and is derived from host cell membrane.

4.2. The two tipes of viruses are: DNA viruses and RNA viruses.

4.3. It require a living media like the embryonic egg, for example.