Biological-Classification-And-System-Of-Classification Question 883
Question: The correct sequence of stages of growth curve for bacteria is [Pb. PMT 1999; CBSE PMT 1999]
Options:
A) Decline, lag, log phase
B) Lag, log, stationary phase
C) Stationary, lag, log, decline phase
D) Lag, log, stationary, decline phase
Show Answer
Answer:
Correct Answer: D
Solution:
The stages of the bacterial growth curve are: Lag phase: Bacteria adapt to their environment and prepare for growth. Log (exponential) phase: Bacteria grow and divide at an exponential rate. Stationary phase: Growth rate slows and stabilizes as resources become limited. Decline (death) phase: Bacteria die at an exponential rate due to depletion of nutrients and accumulation of waste products.
BETA
