Bacteria Growth and Reproduction

Question 1

Generation Time
100 Bacteria Present At Time 0
If Generation Time Is 2 Hr
Time for them to double?

Answer 1

After 8 Hr Mass = 100 X 2^4

of bacteria X double (2)^ hrs(2+2+2+2)

Question 2

Psychotrphs eg?

Answer 2

Listeria ( 0-30 degrees C) freezing temps.

Question 3

Thermophiles?

Answer 3

• 42-44 degrees C

- Campylobacter (dysentry, diarhorrea after poultry food)

Question 4

Alkalphile?

Answer 4

• Vibrio (Cholera, diahorrea)
• uncooked sea food
• parahemolytic…salty water)
• salty environment…halophiles

Question 5

Tuberculosis which antibiotic?

Answer 5

Rifampicin (inhibits RNA synthesis)