During Investigation of the Lac Operon, Jacob and Monod Found

question 6

Multiple Choice

During investigation of the lac operon, Jacob and Monod found that mutations in the same gene did not always lead to the same phenotypic outcome. For example, some mutations in the lacI gene led to constitutive lactose breakdown, whereas other mutations led to an inability to ferment lactose under any conditions. Which of the following statements are true about lacI^s mutations? Please select all that apply.

• A) lacI^s mutants produce a lac repressor protein that cannot bind to DNA
• B) lacI^s mutants cannot be complemented in trans
• C) The operator binding sequence is changed in lacI^s mutants
• D) lacI^s mutants are unable to utilize lactose
• E) Introduction of a functional operon on a plasmid rescues the lacI^s phenotype

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Definitions:

Lead Time

The amount of time that passes from the start of a process until its completion, often used in manufacturing and project management.

Standard Deviation

A measure of the dispersion or variability in a set of data points, indicating how spread out the values are from the mean.

Safety Stock

Additional inventory held to protect against stockouts caused by variability in supply or demand.

Single-Period Model

A decision-making framework used in inventory management for ordering and stocking products that have a one-time demand.