1) Which one of them is part of an operon? a) Inducer b) Structural genes c) Leading strand d) Primer 2) Genetic mutations in DNA sequences that result in shorter, unfinished protein products are called as _______. a) Nonsense codes b) Precursor c) Repressor d) Inducer 3) The activity of an operon is controlled by _______. a) Lagging strand b) Regulator gene c) Structural genes d) Operator gene 4) These genes contain the code necessary to begin the process of transcribing the DNA message of one or more structural genes into mRNA. a) Operator b) Promoter c) Regulator d) Precursor 5) Which of the following binds to the operator gene and prevents it from initiating the synthesis of the protein called for by the operon? a) Precursor b) Promoter c) Inducer d) Repressor 6) An immature mRNA molecule that is transcribed by the activity of the enzyme RNA polymerase is known as a ___________ mRNA. a) Promoter b) Repressor c) Structural d) Precursor 7) A molecule called _________ inhibits the action of the repressor of an operon. a) Lac operon b) Promoter c) Inducer d) Codon

BIO (PART 3)

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