Question

multiple choice question
oligonucleotide signature sequences are ______.

• horizontally - transferable genes found in the pan - genome of all known bacterial populations
• conserved across all major phyla of the bacteria and archaea
• small, conserved nucleotide sequences that are specific only to particular phylogenetic groups of organisms

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Explanation:

Oligonucleotide signature sequences are short, preserved stretches of nucleotides that act as molecular markers unique to specific evolutionary (phylogenetic) groups, distinguishing them from other organism groups. The other options are incorrect: they are not horizontally transferable pan-genome genes, nor are they conserved across all major bacterial and archaeal phyla.

Answer:

small, conserved nucleotide sequences that are specific only to particular phylogenetic groups of organisms