Podcast
Questions and Answers
What is the immediate environment where a microbial population lives called?
What is the immediate environment where a microbial population lives called?
- Microbial community
- Habitat (correct)
- Sewage sludge
- Human tongue
What is a population of cells derived from?
What is a population of cells derived from?
- Environmental stress
- Interaction with higher organisms
- Successive cell divisions (correct)
- Scraped from a human tongue
Why can higher organisms sometimes not survive in certain microbial habitats?
Why can higher organisms sometimes not survive in certain microbial habitats?
- Too hot or too cold
- Too acidic or too caustic
- Too salty or osmotically stressing
- All of the above (correct)
Where do microbial numbers reach maximal levels in the human gastrointestinal tract?
Where do microbial numbers reach maximal levels in the human gastrointestinal tract?
Which part of the digestive tract lacks significant numbers of cellulose-degrading microorganisms?
Which part of the digestive tract lacks significant numbers of cellulose-degrading microorganisms?
What is the pH level in the colon where microbial numbers reach their maximal levels?
What is the pH level in the colon where microbial numbers reach their maximal levels?
Which process involves the microbial fermentation of glucose to produce ethyl alcohol?
Which process involves the microbial fermentation of glucose to produce ethyl alcohol?
What did Louis Pasteur devise to prevent contamination of culture media?
What did Louis Pasteur devise to prevent contamination of culture media?
According to Louis Pasteur, where do microorganisms in putrefying materials come from?
According to Louis Pasteur, where do microorganisms in putrefying materials come from?
What did Louis Pasteur predict would happen if food was treated to destroy all living organisms present and then protected from contamination?
What did Louis Pasteur predict would happen if food was treated to destroy all living organisms present and then protected from contamination?
What did Louis Pasteur construct in 1864 to help with his experiments on sterilization?
What did Louis Pasteur construct in 1864 to help with his experiments on sterilization?
What did the bend in the neck of the flask prevent from entering the nutrient solution?
What did the bend in the neck of the flask prevent from entering the nutrient solution?
How long did nutrient solutions in the flasks remain sterile for?
How long did nutrient solutions in the flasks remain sterile for?
What settled the spontaneous generation controversy forever?
What settled the spontaneous generation controversy forever?
Who provided direct experimental support on microorganisms causing diseases?
Who provided direct experimental support on microorganisms causing diseases?