The end product of a gene's expression blocks additional transcription of the gene. This is an example of:

A) positive control.
B) activation energy.
C) negative control.
D) mutation.
E) natural selection.


C) negative control.

Biology & Microbiology

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Microbial strains that can grow on minimal medium are called ________.

A. minitrophs B. autotrophs C. auxotrophs D. prototrophs

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The cells of bacteria can be categorized according to arrangement or style of grouping. The greatest variety in arrangement occurs in bacilli.

a. true b. false

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