Slide Preparation: Direct Strain Quiz

1. Since most bacterial cells have a ______ charge, we need to use a stain with a ______ charge to stain them.
positive/positive
positive/negative
negative/positive
negative/negative

2. When doing a direct stain on a smear, you should
cover the whole slide with stain
add just enough stain to cover the smear
continuously pour stain over the smear

   

On To Aseptic Techniques