Question

what is being identified when antibodies stick to pathogens during immunostaining? genes dna agar antigens

Explanation:

In immunostaining, antibodies bind to specific targets. Antigens are molecules (on pathogens, for example) that antibodies recognize and bind to. Genes are genetic units, DNA is genetic material, and agar is a medium—none fit the antibody - pathogen binding context here. So the correct answer relates to antigens.

Answer:

antigens (the option corresponding to "antigens")