As a proper noun protozoa

is protozoans; eukaryotes that are primarily unicellular, existing singly or aggregating into colonies, and usually nonphotosynthetic, placed either as:.

As a noun kinetoplast is

(microbiology) a disk-shaped mass of circular dna inside a large mitochondrion, found specifically in protozoa of the class kinetoplastea - (kinetoplastids).