Hydrogen bonds (H-bonds) are broken between the nitrogenous bases when the two strands of DNA separate.
These bonds are not as strong as the covalent bonds holding together the sugar and phosphate in the backbone, so the H-bonds break first.
The hydrogen bonds are broken in order to unzip the DNA strand. This all occurs during the DNA replication process.
Helicase unzips the double stranded DNA so that it can be replicated.
Helicase an enzyme that causes the DNA strands to unzip and unwind by breaking the weak hydrogen bonds between the complementary bases
The hydrogen bonds between the complimentary nitrogen bases.
Hydrogen Bonds
hydrogen in bases
pi bond
DNA polymerase are enzymes that form bonds between nucleotides during replication.
the hydrogen bonds between the nitrogen bases must be broken and the molecule must unwind.
Replication.
That would be called the Replication Fork
The hydrogen bonds between base pairs are broken
hydrogen in bases
DNA polymerase are enzymes that form bonds between nucleotides during replication.
The difference between between replication and replication is that replication is the series of copies, and repetition is the series of repeats.
It's the DNA polymerase that catalyzes the formation of phosphodiester bonds between the nucleotides during replication.
The hydrogen bonds are broken in order to unzip the DNA strand. This all occurs during the DNA replication process.
the hydrogen bonds between the nitrogen bases must be broken and the molecule must unwind.
A cell's DNA is copied during replication.
Replication.
That would be called the Replication Fork
Chromosomes are replicated during DNA replication, which occurs during interphase.
Helicases must break the hydrogen bonds between paired nucleotide bases (Thymidine-Adenosine or Guanosine-Cytosine) of DNA strands so the two strands can be separated and replicated. The origins of replication, the initial "replication bubbles", tend to be in sequences that are A-T rich because Adenine-Thymidine has only two hydrogen bonds, energetically easier for helicases to start breaking than the three hydrogen bonds between Guanosine-Cytosine. For replication to continue topoisomerases must also cut the phosphate backbones of DNA strands, otherwise the helically wrapped strands would get much too overwound or "supercoiled" for polymerases and related replication machinery to continue to function. Nucleosomes (complexes of histone proteins that DNA wraps around) also have to be rearranged or removed to allow for replication.
hydrogen