BACTERIAL GROWTH

Question 1

ENVIRONMENTAL FACTORS INFLUENCING
BACTERIAL GROWTH

Answer 1

Temperature

Oxygen

pH

Question 2

BACTERIAL GROWTH cycle

Answer 2

1. Lag Phase: mobilize metabolites
2. Log (Exponential) Phase: bacteria are most susceptible to antibiotics/chemicals; secondary metabolites (e.g. antibiotics) produced in late log phase
3. Stationary Phase: Secondary metabolites continue to be synthesized
4. Death (Decline) Phase:
5. Phase of Prolonged Decline: 1% cells (“fitter cells”) left; modified population (“survival of the fittest”).