Which of the following is(are) not cis-acting? a. lacI b. lacO c. TATA box d. Enhancers e. Items a and b are not cis-acting

Which of the following is(are) not cis-acting? a. lacI b. lacO c. TATA box d. Enhancers e. Items a and b are not cis-acting f. There is not enough information to determine this

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Expert Solution

4. The correct option is ............................a.lacI

The components of transcription are termed as cis acting and transacting.
Cis acting is the structural portion of a gene which is required for gene expression.
Trans acting factors are the proteins which associate with Cis acting factors to control gene expression.
Cis acting factors can be located in a promoter or an enhancer.
Cis acting elements are located in non coding regions of DNA.
A single cis element is sufficient to produce a regulatory response.
TATA box is a promoter sequence, and it indicates where the genetic sequence could be read and decoded in a DNA.
Transcription factors associate with the TATA box to promote the transcription of a gene.
Enhancer is a region of DNA that bound to transcription activators (mostly proteins) to activate the transcription of a gene.
The operator present in the lac operon also forms as an example of the Cis acting regulatory sequence.
Lac I is a repressor protein involved in the lactose metabolism, LacI inhibits the expression of genes to transcribe the protein coding.

gladiator answered 1 year ago

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