Choose the proper item below for statements 54–57

a. operon
b. operator
c. promoter
d. lactose
M 54. This item contains regulator, promoter, and operator
regions.
D 55. A repressor protein can shut down transcription by
binding to this item.
M 56. This item codes for the production of a repressor.
D 57. When the repressor is inactivated, RNA polymerase
can bind to this item and allow transcription to occur.


Answers: 54. a, 55. b, 56. e, 57. c

Biology & Microbiology

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