Question: What actually is a twist and a writhe? Edit
Answer: As you know, deoxyribonucleic acid (DNA) is the basic building blocks. They carry generic information in the cell. They can self-replicate and synthesize RNA or ribonucleic acid. Each DNA consists of two long chains of nucleotides that are twisted into a double helix and joined together by hydrogen bonds between complementary bases cytosine and guanine or adenine and thymine.
We use hardcore mathematics to learn topology and the geometric aspects of this double helix structure of DNA. The double helix follows an axis which is curved with the main structure itself twisted ans this is called supercoiling which plays a very important role in the study of biology.
To study the curves, describe their shape and relation of one to another, mathematicians use 3 quantities and those are linking number, twist and writhe.
Twist - Twist is the number of times each of the DNA curves rotates around its central axis 'C' of double helix.
Writhe - This is the number of times the central axis 'C' makes loops about itself. Edit
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