Question

The correct sequence of stages of growth curve for bacteria, under favorable condition is

• A. Decline, lag, log phase
• B. Lag, log, stationary phase
• C. Stationary, lag, log, decline phase
• D. Lag, log, stationary, decline phase

Answer 1

The correct option is D Lag, log, stationary, decline phase

Under favorable condition bacterial growth is in geometric progression. This is called exponential growth. When we inoculate given number of cell in fresh medium and monitor the growth of population over a period of time and plot the data then a typical growth curve is obtained. Growth curve has four phases: (1) Lag phase, (2) Log or exponential phase, (3) Stationary phase, (4) Death phase.

Thus, the correct answer is option D.