Question

Choose the correct sequence of stages of growth curve for Bacteria

• A. Leg, Log, stationary, Decline phase
• B. Leg, Log, Stationary phase
• C. Stationary, Leg, Log, Decline phase
• D. Decline, Leg, Log phase

Answer 1

Answer: (A)

Leg, Log, stationary, Decline phase

Answer 2

The correct option is (A) : Leg, Log, stationary, Decline phase

The growth cycle contains four distinct stages, which are: 1. The lag phase, which occurs just after the cells are infused into new medium, is when enzymes, proteins, and RNA are synthesised. 2. Exponential (log) phase, during which all cells routinely undergo binary fission divisions and expand by geometric progression. Depending on the make-up of the growth medium and the incubation circumstances, the cells divide at a consistent pace. 3. Stationary phase: In a culture, exponential development cannot go on indefinitely. One of three things can prevent population growth: running out of nutrients; building up inhibitory metabolites or end products; or running out of room (also known as running out of biological space). 4. Death phase—this phase comes next if incubation continues after the population reaches stationary.