Which is the best way to determine if an object is made out of pure silver

se bleach to test for silver

Start by carefully pouring just a drop of the bleach onto the item in question. If it is really made of silver, then the coin or jewelry will tarnish and quickly turn black.

Explanation:

enzyme speed up the reactions

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus