A replication bubble.
nucleotide
To unwind the DNA double helix
inverted sequences of DNA which forms a structure called a cruciform
The DNA molecule forms a double helix. The linear DNA chromosomes of eukaryotes form a highly supercoiled double helix.
separate strands of nucleic acids (unwind DNA)
They must unwind part of the original DNA molecule.
nucleotide
Helicase unwind the two DNA strands while topoisomerase unwind and also rejoin the the two strands of DNA.
To unwind the DNA double helix
All of it, that is the shape of the molecule.
inverted sequences of DNA which forms a structure called a cruciform
The DNA molecule forms a double helix. The linear DNA chromosomes of eukaryotes form a highly supercoiled double helix.
separate strands of nucleic acids (unwind DNA)
In the very first step of mitosis, the prophase.
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The nuclear membrane constructs back up around the DNA during telophase.
The deoxyribose is an essential pentose in DNA. It forms part of the ladder together with phosphate group.