regarding louis pasteurs experiments with the s - necked flask, which of the following statements is…
regarding louis pasteurs experiments with the s - necked flask, which of the following statements is true?\nair exchange was involved\na food source was provided\nthe possibility of contamination was removed\nall preexisting microorganisms were killed\nall choices are true\nquestion 16 (1 point)\nwhat type of stain distinguishes bacteria based on cell wall differences?\ngram stain\nnegative stain\nsimple stain\nflagella stain
Answer
Brief Explanations:
- In Pasteur's S - necked flask experiments: Air could enter the flask through the S - shaped neck, a broth (food source) was placed inside, by boiling the broth all preexisting microorganisms were killed, and the S - shape of the neck removed the possibility of contamination from the air.
- Gram - staining is a method that differentiates bacteria based on differences in their cell - wall composition. Gram - positive bacteria and gram - negative bacteria have different cell - wall structures that cause them to stain differently with the Gram - stain.
Answer:
Question 15: All choices are true Question 16: Gram Stain