Final answer:
The nucleotide sequence is not considered to be a phenotypic biochemical characteristic used for microbial identification. Phenotypic biochemical characteristics involve observable traits and biochemical reactions that provide information about the metabolic capabilities of microorganisms.
Step-by-step explanation:
The characteristic/compound that is not considered to be a phenotypic biochemical characteristic used for microbial identification is nucleotide sequence. Phenotypic biochemical characteristics involve observable traits and biochemical reactions that provide information about the metabolic capabilities of microorganisms. Examples of phenotypic biochemical characteristics used for microbial identification include carbon source utilization, oxygen requirements, and enzyme activity.