Mutations in the DNA sequence of a promoter or an operator can act Group of answer choices only in trans on multiple operons only in cis either in trans or in cis all of the above
Added by Mohamed D.
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" - "In cis" refers to mutations that affect the same DNA molecule or sequence where they occur. For example, a mutation in a promoter that affects the transcription of a gene on the same DNA strand is a cis effect. - "In trans" refers to mutations that affect Show more…
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The promoter of an operon is the site to which $\mathrm{RNA}$ polymerase binds to begin transcription. Certain base changes in the promoter result in a mutant site to which RNA polymerase cannot bind. Would you expect mutations in the promoter that prevent binding of RNA polymerase to act in trans on another copy of the operon on a plasmid in the cell, or only in cis on the copy immediately adjacent to the mutated site?
Adi S.
As a general principle of gene regulation through operons: regulatory genes encode trans-acting proteins that interact with cis-acting DNA elements regulatory genes encode cis-acting proteins that interact with cis-acting DNA elements regulatory genes encode cis-acting proteins that interact with trans-acting DNA elements regulatory genes encode trans-acting proteins that interact with trans-acting DNA elements
Derrick D.
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