Question

Naked DNA virus is
(a) Poliovirus
(b) Adenovirus
(c) Reovirus
(d) Ribovirus

Answer 1

Hint: These viruses are non enveloped medium-sized viruses with an icosahedral nucleocapsid and contain a double-stranded DNA genome. The name of this virus is derived in 1953 from their first isolation from human adenoids.

Complete answer:
Adenovirus belongs to the family Adenoviridae and is a naked DNA. Usually, such DNAs that are naked are not associated with lipids, proteins, or any other molecules that help protect it. They are a result of the release of genetic information into the surrounding environment like the bursting of cells. Adenovirus is spheroidal and is about 80 nm across and is covered with 252 routinely arranged capsomeres that are protein subunits. These have deoxyribonucleic acid enclosed in a protective coat of protein. Adenoviruses often are packed in a crystalline arrangement in the nuclei of infected cells and also develop here. It includes 6 genera and 47 species and they cause fever, sore throat, infections to the nervous system, eyes, intestines, urinary tract, in humans, hepatitis in dogs, and many diseases in cattle, fowl, mice, pigs, and monkeys. Not all the 47 different adenovirus species cause illness in humans. Thus a vaccine can be created but there are more than 100 cold viruses and are found as disease agents. This high number makes the production of vaccines virtually impossible.
 So, the correct answer is 'adenovirus'.

Note: The infections caused by adenovirus usually lasts three to five days but serious ones can last up to weeks. Complications can include inflammation of the brain and spinal cord. There is no specific treatment for this infection and it mostly helps to relieve symptoms. Care should be taken to read the label and use medications as there are no approved antiviral medicines for this infection.