When DNA is duplicated during mitosis: two molecules are formed, each with an original "upright"
the original molecule thickens and separates into two
two completely new DNA molecules are formed
one completely new DNA molecule is formed

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen