B5.4 Preventing bacterial growth Flashcards
1
Q
When do bacteria divide under suitable conditions?
A
Every 20min
2
Q
What is the growth rate of bacteria affected by?
A
Temperature
Nutrients
Oxygen levels
pH
3
Q
How can you calculate the number of bacteria in a population?
A
Bacteria at the beginning of growth period x 2 ^ number of divisions
4
Q
What are disinfectants?
A
Are chemicals used to kill bacteria in the environment
5
Q
What are antiseptics?
A
A disinfectant that is safe to use on human skin
6
Q
What is antibiotic?
A
Antibiotic are chemicals that can be used inside our bodies which can kill bacteria or prevent them from growing
