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What unzips a molecule into two strands?

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Enzymes "unzip" the DNA.
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How is a DNA molecule unzipped?

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

What occurs when a molecule of Dna is unzipped?

One double stranded Dna molecule is separated into two single stranded Dna molecules. A large multitude of bioprocess possibilities subsequentially present themselves!

What happens when a molecule of DNA unzips?

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.
In Biology

At the beginning of DNA replication what two processes unzip the two strands of a DNA molecule?

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
In Biology

What enzyme unwinds are unzips the parent strand?

during nucleic acid reading and replication the double strand of  DNA must be unwound and opened up (unzipped) at the same time. In  the polymerase complex this function is