The molecular interaction between an antigen presenting cell and a T cell is

A) The molecular interaction between an antigen presenting cell and a T cell is a dendrite.
B) an immunological synapse.
C) CD95L.
D) regulatory TCR.
E) clonal expansion.

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.