Why do cheek cells stain red with the gram stain? What is the big red circle in the middle of the cheek cell? - Considering that it isn’t possible to identify bacteria from a Gram stain, why might a physician perform a Gram stain on a sample before prescribing an antibiotic? - What cells stain red in a Gram stain? What cells stain purple in a Gram stain?

Select all that apply to a negative stain:    1. involves a washing step 2. cells may be distorted or shrunken  3. uses an acidic or negatively charged dye which stains the background 4. uses multiple dyes in the procedure 5. uses only 1 dye in the procedure 6. involves fixing 7. does not involve fixing 8. cells will not be distorted or shrunken 9. does not involve a washing step 10. can show cell morphology, size, and arrangement 11. uses a basic or positively charged dye which stains the bacterial cells

All except which of the following are important aspects to consider in determining the G+C content of a microorganism?   a) determination of gram stain   b)double stranded dna absorbs less light than single DNA strang   c)he greater the G+C content, the higher the temperature required to denature DNA   d) 3 hydrogren bonds between G+C content vs 2 hydrogen bonds between A and T

You and a partner conduct the acid-fast staining using the same two bacteria. You know that there will be an acid-fast bacteria present. Your slide shows acid-fast and non-acid fast bacteria. Your partners show both bacteria are non-acid fast. Your partner doesn’t understand why. What errors do you think occurred? Please state 2 and explain why these errors would cause this result.