LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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regulate access of RNA polymerase to specific genes
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turn on and off the molecules of tRNA
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control the process of transcription within the nucleus
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generate amino acids for protein synthesis
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Detailed explanation-1: -Operator genes contain the code necessary to begin the process of transcribing the DNA message of one or more structural genes into mRNA. Thus, structural genes are linked to an operator gene in a functional unit called an operon.
Detailed explanation-2: -(Genetics) In the Operon Model, the operator is the gene in which a repressor binds. This results in the prevention of the RNA polymerase from binding to it, thus, preventing the expression of certain genes in the operon unit.
Detailed explanation-3: -RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription.
Detailed explanation-4: -Promoter is a DNA sequence where the RNA polymerase binds to initiate transcription. Operator is the DNA segment where the repressor molecule binds to the operon model. They are present in both eukaryotes and prokaryotes. They are found only in prokaryotes.