EVERYDAY SCIENCE

Detailed explanation-1: -A virus is an infectious particle that reproduces by “commandeering” a host cell and using its machinery to make more viruses. A virus is made up of a DNA or RNA genome inside a protein shell called a capsid. Some viruses have an external membrane envelope. Viruses are very diverse.

Detailed explanation-2: -Viruses. Viruses are assembles of organic molecules that consist of some short strands of RNA or DNA encapsulated within a protein shell. They are often referred to as if they were living organisms, but they don’t meet the criteria listed above for living things.

Detailed explanation-3: -Leuko virus contains both DNA and RNA.

Detailed explanation-4: -Human diseases causing RNA viruses include Orthomyxoviruses, Hepatitis C Virus (HCV), Ebola disease, SARS, influenza, polio measles and retrovirus including adult Human T-cell lymphotropic virus type 1 (HTLV-1) and human immunodeficiency virus (HIV).

Detailed explanation-5: -A type of virus that has RNA instead of DNA as its genetic material. It uses an enzyme called reverse transcriptase to become part of the host cells’ DNA. This allows many copies of the virus to be made in the host cells.