DNA in cell chromosomes is usually tightly wrapped into dense, complex cylinders
ID: 50261 • Letter: D
Question
DNA in cell chromosomes is usually tightly wrapped into dense, complex cylinders. But cells have the capacity to alter such structures so that the DNA strands inside are exposed to the contents of the cell nucleus. What is the advantage to cells of exposing bare DNA?
RNA transcription ’start’ sites can be recognized by proteins
Protein molecules can be made directly from DNA nucleotide sequences without having to produce messenger RNA first
DNA in the compact cylindrical form is unstable and slowly degrades
Only bare DNA is subject to mutational change and without mutation evolution can not proceed
1.RNA transcription ’start’ sites can be recognized by proteins
2.Protein molecules can be made directly from DNA nucleotide sequences without having to produce messenger RNA first
3.DNA in the compact cylindrical form is unstable and slowly degrades
4.Only bare DNA is subject to mutational change and without mutation evolution can not proceed
Explanation / Answer
RNA transcription ’start’ sites can be recognized by proteins. ---- start sites can be recognized by proteins , if whole of the DNA would be packaged by histones then it would be very difficult for the proteins to recognize the start site and hence translation would be critical process for the celll
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