Passage I
Bacteria reproduce by a process in which a single cell divides into two cells. The average time required for bacteria to divide and their population to double is called the generation time. Table 1 presents the generation time for a variety of bacteria at a given temperature.
Bacterial population growth occurs in a series of distinct steps referred to as a bacterial growth curve. It consists of 4 phases, which reflect changes in the cells' environment and metabolism over time. See Figure 1.
4. Samples of growth medium containing milk were inoculated with the microorganisms depicted in Table 1 and put in an environmental chamber at 37°C. Which of the following bacteria would take closest to 1 hour to double its population?
Your Answer is
Correct Answer is F
Explanation
Look at table 1 and find the bacteria whose generation time is close to 60 min when the growth medium is milk. It should be lactobacillus acidophilus 66 min