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What unwinds and unzips a DNA molecule?
Helicase an enzyme that causes the DNA strands to unzip and unwind by breaking the weak hydrogen bonds between the complementary bases
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Replication and/or Transcription.
This method is called " Semi-conservative " which replicates the DNA so it begins with unzipping, unwinding the DNA by breaking down the hydrogen bonds between the nitrogenou…s bases with the help of " helicase enzyme " that helps separating the strands. After that the free nucleotides will be activated by adding extra two phosphate groups from ATP to provide Energy for binding, and then the activated nucleotides will attach to the DNA as that Adenine link with thymine with double hydrogen bonds and Cytosine link with Guanine with triple hydrogen bonds. And Finally the DNA polymerase enzyme will catalyzes the joining of the nucleotides of the new strands with the formation of phosphodiester bonds while the extra phosphate groups that were attached to the activated nucleotides are released.
An enzyme known as "DNA helicase" unwinds the DNA molecule's double helix structure.
The original strand of DNA is unzipped by an enzyme that breaks the hydrogen bonds between the bases. This process continues until the entire strand of DNA has been unzipp…ed and copied.
Quite the contrast, actually. During mitosis, the DNA is in a coiled form of chromosome. During DNA replication, however, the DNA is unwound with the help of an enzyme DNA hel…icase.
On the replication forks.
One double stranded Dna molecule is separated into two single stranded Dna molecules. A large multitude of bioprocess possibilities subsequentially present themselves!
DNA splits, and mRNA and tRNA are there to create new strands for the new replicated DNA strand. This is what happens prior to mitosis in cell division.
replication fork :)
DNA Helicase unzips the double helix, breaking the hydrogen bonds between complimentary base pairs to form a replication fork.
Most of the time during a cell's life, the DNA stays unwound as chromatin, only when mitosis or meiosis occurs does it condense into chromosomes. This is so it is easier to se…parate and, since chromosomes are symmetrical, each new daughter cell will get the same DNA as the original cell. After mitosis (or meiosis) the chromosomes unwind to form chromatin again.
Transcription and replication. According to evolution that is. Is this question asking at the begininning of time, or an overall in-body DNA question? Life as we know it canno…t replicate itself without being in a living organism. RNA polymerase reads and unzips the double helix of DNA to create RNA in which leads on to creating protiens... yahda yahda yahda. According to the scientific evidence on the original formation of DNA... somehow the necessary compounds for creating it orginated out of a slew in the hot early times of earth over 3000 million years ago. This also could have been helped by on or two meteroids hitting earth with some valuable new atoms or compounds. And out of these compounds, there arrived DNA. Developed and replicated there in the mud with no ATP energy... and started to move on to develope bacteria, which much later evolved into us. Do I believe this? No I certainly do not. I know that God created the earth and that our bodies and everything organism out there... is made up out of; Nitrogen, Oxygen, Carbon, and Hydrogen. What are the 4 main components of dirt? Nitrogen, Oxygen, Carbon, and Hydrogen. Isn't it lovely what science has figured out for us?