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MICR221 Exam Questions With Correct
Answers
How do you tell if bacteria is dead or alive - answer✔✔Culturing it on an argar to see if it grows
K-type strategist - answer✔✔Slow growing
Food preserving
Longer lasting
r-type strategist - answer✔✔Much faster growing bacteria,
Wastes food faster than it can reproduce
Latent infection - answer✔✔Dormant infection of virus/bacteria until immune system in
compromised -> lead to full blown infection
What is persistence in bacteria and what are its key features - answer✔✔Ensuring bacteria
sustains food and survives. This is done by:
- Slowly reproducing (k-species)
- forming dormant cells (endospores)
what are dormant cells? - answer✔✔cells that persist even after screening
Possible causes of Persistent Bacterial Infections (2) - answer✔✔Antibiotic Persistence:
Non-Heritable persistent state
Antibiotic Resistance:
Heritable Resistacne
What is Antibiotic Persistence? - answer✔✔Where the bacteria enters a dormant persistent state
to avoid being detected by the antibiotic. (eg: penicillin targets and breaks down bacterial cell
walls. However, it can not target dormant bacterias walls as they are not turning over and
repairing.
MICR221 Exam Questions With Correct
Answers
How do you tell if bacteria is dead or alive - answer✔✔Culturing it on an argar to see if it grows
K-type strategist - answer✔✔Slow growing
Food preserving
Longer lasting
r-type strategist - answer✔✔Much faster growing bacteria,
Wastes food faster than it can reproduce
Latent infection - answer✔✔Dormant infection of virus/bacteria until immune system in
compromised -> lead to full blown infection
What is persistence in bacteria and what are its key features - answer✔✔Ensuring bacteria
sustains food and survives. This is done by:
- Slowly reproducing (k-species)
- forming dormant cells (endospores)
what are dormant cells? - answer✔✔cells that persist even after screening
Possible causes of Persistent Bacterial Infections (2) - answer✔✔Antibiotic Persistence:
Non-Heritable persistent state
Antibiotic Resistance:
Heritable Resistacne
What is Antibiotic Persistence? - answer✔✔Where the bacteria enters a dormant persistent state
to avoid being detected by the antibiotic. (eg: penicillin targets and breaks down bacterial cell
walls. However, it can not target dormant bacterias walls as they are not turning over and
repairing.
