When Referring to Cell Metabolism and Using Digital Logic Analogies

Multiple Choice

When referring to cell metabolism and using digital logic analogies, which of the following statements is correct? (Select all correct choices)

A) transcription of the lac operon is an example of an OR gate only, because both lactose and cAMP must always be present
B) transcription of the lac operon is an example of an OR gate only because either lactose OR cAMP must always be present
C) transcription of the lac operon is an example of an AND or OR gate because differences in the lactose concentration can lead to different transcriptional switch behaviors
D) transcription of the lac operon is an example of an AND or OR gate because differences in the cAMP concentration can lead to different transcriptional switch behaviors
E) transcription of the lac operon is an example of an AND gate only, because both lactose and cAMP must always be present