Which is incorrect about inducible operons?

A. include the lac operon
B. often encode enzymes for catabolic pathways
C. are turned on by the substrate of the enzyme
D. have genes turned off by a buildup of end product
E. are normally turned off


Answer: D

Biology & Microbiology

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Transgender individuals 

A. often seek sex change (gender reassignment) surgery. B. believe they are a sex different from what their body is. C. often dress and behave as a gender different from what their body is. D. All of the above are correct.

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Contact inhibition is an important mechanism for maintaining cell growth in developed organs and tissues. Suppose the organ and tissue cells remain in contact with each other. In order to prevent the cells from dividing, which phase of the cell cycle must they be in?

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A scientist is studying endosymbiosis in cells. This means she is investigating

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