Question

Pilli is a rigid tubular appendages in
Gram positive bacteria
Gram negative bacteria
Both a and b
Actinomycetes

Answer 1

Explanation:

The gram-positive bacteria retain the crystal violet and stain purple, while the Gram-negative bacteria lose the crystal violet and stain red from the safranin counterstain. So by Gram-staining technique and the color they retain is crystal violet or not describes the features of the bacteria, as well they are characterized as positive or negative.