4.11 Flashcards
Carmen
1
Q
What is the name of the process in which bacteria split in half?
A
binary fission
2
Q
In ideal conditions in how many minutes can bacteria split into two cells?
A
20
3
Q
What are the ideal conditions for bacteria?
A
plenty of food, oxygen and water and a warm temperature
4
Q
What do we need to do in order to investigate bacteria?
A
culture them
5
Q
Where are bacteria normally grown?
A
agar plates (with agar jelly)
6
Q
Why is it important to take care of microorganisms when you grow them? Give 3 reasons
A
- there is always the risk of a mutant strain arising that may be pathogenic
- there is a risk of contamination of the culture by pathogenic microorganisms from the environment
- when you grow a pure strain of a microorganism, the entry of any other microorganisms form the air or your skin into the culture will contaminate it
7
Q
what are aseptic techniques?
A
methods of carrying out a procedure to prevent contamination by unwanted microorganisms
8
Q
What does it mean to keep something sterile?
A
to keep something free from living microorganisms and their spores
