The Graph Below Shows a Growth Curve of E

question 9

Multiple Choice

The graph below shows a growth curve of E.coli growing in a defined medium containing equal molar amounts of glucose and lactose.

Figure 23.1
Based on your knowledge of the regulation of the lac operon,the best explanation of these results is that

• A)early on, due to the presence of lactose, the bacteria utilize the lac operon. Glucose is used later.
• B)the bacteria are utilizing both sugars simultaneously.
• C)the presence of glucose causes the formation of cAMP catabolic repressor protein (CR
• P)complexes, which shut down the lac operon until the glucose is used up.
• D)glucose is used first. Once glucose becomes limiting, intracellular cAMP increases, forming cAMP-CRP complexes that activate the lac operon to use lactose.
• E)none of the above

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Definitions:

Out-Groups

Groups of individuals not belonging to the dominant or main group in a social, work, or other settings, often lacking the same influence or privileges.

Acquaintance Phase

Describes the initial stage in the development of a relationship where individuals get to know each other, setting the foundation for further interaction and connection.

Leadership Making

The process of developing and enhancing leadership qualities within an organization through strategies like coaching, mentoring, and training.

Acquaintance Phase

The initial stage of a relationship or process where parties get to know each other.