In: Biology
as per our guidelines i answer first question.
2.
a) coronavirus is a kind of commonly seen virus , cause infection in nose, sinuses or upper throat. SARS-CoV -2 is the is the new type of coronavirus that outbreak happened in china and spread all over the world. covid 19 has RNA + nucleoprotein as its genome . lipid bilayer membrane is present as the protective sheath. this membrane consists of membrane proteins. the spikes are seen towards outside is called glycoprotein. small membrane proteins are seen between the genome and lipid bilayer.
b) in early December 2019 first case was reported in a whole sale food market in Wuhan, China. some of the international authorities are Claiming that the virus may have escaped from a lab in wuhan. there are these controversies discussed all over the world. the two virology labs present at wuhan increasing the chance mainly announced by American government.
c) coronavirus is a previously existed virus presented in 2012. the strains of these viruses varies across the globe. in 2012 MERS-CoV is the virus emerged that is middle east respiratory syndrome. this virus is evolved from SARS 2003. that is commonly called severe acute respiratory syndrome. from this SARS-CoV the SARS CoV -2 that is covid - 2019 emerged at 2019. the virus is from the genus Betacoronavirus and family Coronaviridae. order is Nidovirales and realm is Riboviria.