3. COVID-19 vaccines help our bodies develop immunity to the virus. Please describe how mRNA COVID-19 vaccines work
2. Two polypeptides, A and B, have similar tertiary structures, but A normally exists as a monomer, whereas B exists as a tetramer. What differences might be expected in the amino acid composition of A versus B?
二、簡答題
1. What is epigenetic regulation? Discuss how environmental factors may affect epigenetic regulation in humans.
This is a large modal.