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What is the usual role of a terminator sequence?

Answer and explanation

Correct answer: To signal the end of gene expression

Direct answer: Option A is correct. A terminator sequence normally signals that transcription or gene expression should stop at a particular point. In simple terms, genetic information is read to make an RNA molecule and, when applicable, a protein. The terminator acts like a stop instruction so the reading process ends at the proper place rather than continuing unnecessarily. The exact molecular details can differ between systems, but the general school-level role is termination of transcription or expression. Option A works because it describes this stop signal. Option B, giving light to a cell, is not the function of a DNA terminator; light production, when present in biotechnology, depends on particular genes and proteins. Option C, making RNA into fat, is not a definition of a terminator sequence and confuses genetic information with metabolism. Option D, making DNA into salt, is biologically meaningless and does not describe nucleic-acid regulation. Therefore the stated answer is sound. Memory trick: promoter means start, terminator means stop; do not confuse a terminator with a gene that produces a visible marker.

Related tags

TerminatorGene ExpressionDna

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