Chapter 5.6 The Growth Cycle

Question 1

What is a closed-system microbial culture of fixed volume called?

Answer 1

Batch Culture

Question 2

What are the four phases in a closed system for the growth curve of cells?

Answer 2

1. ) Lag Phase
2. ) Exponential Phase
3. ) Stationary Phase
4. ) Death Phase

Question 3

Describe the Lag Phase

Answer 3

Interval between inoculation of a culture and beginning of growth

Question 4

Describe the Exponential Phase

Answer 4

Cells in this phase are typically in the healthiest state

Question 5

Describe the Stationary Phase

Answer 5

Growth rate is zero

Either an essential nutrient is used up, or waste product of the organism accumulates

Question 6

Describe the Death Phase

Answer 6

If incubation continues after cells reach stationary phase, the cells will eventually die