Can yall answer two questions in one for me? It makes the test go faster... PLEASE HELP!! A sequence of three nucleotide bases on mRNA is called:
Intron
Exon
Anticodon
Codon


The nucleotide not found in DNA is:
Adenine
Thymine
Guanine
Cytosine
Uracil

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