that hold the double helix together. 13. In principle, gene expression can be co

Question

that hold the double helix together. 13. In principle, gene expression can be controlled at any of the steps between a gene and its ultimate is the most important ctional product. For the majority of genes, however, the point of control. Because this control point can ensure that no unnecessary intermediates are synthesized. (a) controlling when and how often a given gene is transcribed b) controlling which mRNAs are exported from the nucleus to the cytosol (c) controlling which mRNAs are translated into protein by the ribosomes (d) controlling how the primary RNA transcripts is spliced or otherwise processed

Explanation / Answer

13. The correct option will be

(a) controlling when and how often a given gene is transcribed.

Transcription is formation of mRNA from DNA (gene). Transcription is followed by the transport of mRNA from nucleus to cytosol, and mRNA processing. Finally the mRNA is translated into protein (end product of gene). So transcription being the first step is the best point of control to prevent synthesis of unnecessary intermediates. If transcription will not happen, no mRNA will fork and hence no protein.

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