Micro 206 Lab Final- ASU- Daydif questions with correct answers

Why do we stain microbes? CORRECT ANSWER Increase Contrast What chemical attribute do basic stains have? CORRECT ANSWER A cation What are some basic stain examples? CORRECT ANSWER Methylene blue, crystal violet What chemical attribute do acidic stains have? CORRECT ANSWER An anion What is an example of an acidic stain? CORRECT ANSWER Nigrosin What is the biggest part of smear prep? CORRECT ANSWER Heat fix the bacteria What is peptidoglycan? CORRECT ANSWER bacteria specific cell wall component What is a gram positive bacteria? CORRECT ANSWER thick cell walls can withstand higher internal pressure What color do gram positive bacteria stain? CORRECT ANSWER purple What is gram negative bacteria? CORRECT ANSWER Thin layer of peptidoglycan, have outer membrane