How can we recognize viruses by antigen presenting cells?

The first amino acid of a new polypeptide chain is

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?