The Designation His⁻ Refers to

Multiple Choice

The designation his⁻ refers to

A) the genotype of bacteria that lack a functional gene for histidine synthesis AND bacteria that are auxotrophic for histidine.
B) the genotype of bacteria that have a functional gene for histidine synthesis AND bacteria that require addition of histidine to the growth medium.
C) the genotype of bacteria that have a functional gene for histidine synthesis AND bacteria that are auxotrophic for histidine.
D) the genotype of bacteria that lack a functional gene for histidine synthesis AND bacteria that have a hers gene.
E) the genotype of bacteria that lack a functional gene for histidine synthesis AND bacteria that do not require addition of histidine to the growth medium.