DNA regions that are transcriptionally silenced by hypercondensation have often undergone a modification of their residues termed . a. hyperoxidation.
b. methylation.
c. dephosphorylation.
d. phosphorylation.
e. integration.

The study of cells is cell biology.

The correct answer is B.

Science can be defined as a branch of intellectual and practical study which systematically observes a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants, and humans) in the natural world through experiments.  

Genome editing can be defined as a high-tech process that avail scientists the opportunity or ability to remove (delete), replace, and insert Deoxyribonucleic Acid (DNA) sequence in a living organism such as bacterias, animals, plants, etc in order to correct a genetic disorder and to improve on their physical and chemical conditions.  Transcription can be defined as a process that typically involves re-writing the information contained within a Deoxyribonucleic Acid (DNA) into a Ribonucleic Acid (RNA) by enzyme RNA polymerase.  Hence,

DNA regions that are transcriptionally silenced by hyper condensation have often undergone a modification of their cytosine residues termed methylation.  

Hence, the correct answer is B that is methylation.

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b. methylation.

Explanation:

Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments.

Genome editing can be defined as a high-tech process which avail scientists the opportunity or ability to remove (delete), replace and insert Deoxyribonucleic Acid (DNA) sequence in a living organism such as bacterias, animals, plants etc in order to correct a genetic disorder and to improve on their physical and chemical conditions.

Transcription can be defined as a process which typically involves re-writing the informations contained within a Deoxyribonucleic Acid (DNA) into a Ribonucleic Acid (RNA) by enzyme RNA polymerase.

Hence, DNA regions that are transcriptionally silenced by hypercondensation have often undergone a modification of their cytosine residues termed methylation.

For example, CpG island methylation transcriptionally silences about 650 to 800 genes in patients suffering from colorectal cancer.