Hydrogen Bonds
Hydrogen bonds between the nitrogenous bases need to be broken for the DNA strand to separate during replication or transcription.
DHISS DiKC
Before the two strands of a DNA molecule can separate during replication, the hydrogen bonds holding them together must be broken, and the double helix structure unwound by enzymes such as helicase. This allows the DNA polymerase enzyme to move along each strand and synthesize complementary new strands.
Hydrogen Bonds.
telomeres
Heat anneals DNA strand i.e. separate two strands of DNA to build anti-codon to desired DNA strand
old is broken but new is not
During DNA replication, the two DNA strands separate at the origin of replication, forming a replication bubble. Enzymes like helicase unwind the DNA strands, while DNA polymerase replicates each strand by adding complementary nucleotides. This process ensures that each newly formed DNA molecule contains one original strand and one newly synthesized strand.
Hydrogen bonds between the complementary base pairs must be overcome to separate the two DNA strands during replication. Breaking these bonds allows the strands to unwind and separate, enabling DNA polymerases to replicate each strand.
The hydrogen bonds are broken in order to unzip the DNA strand. This all occurs during the DNA replication process.
replicated DNA is made of one old strand and one new strand.
For transcription to occur, the double helix structure of DNA must unwind and separate at the promoter region of the gene being transcribed. This unwinding exposes the template strand of the DNA, allowing RNA polymerase to synthesize a complementary RNA strand by adding ribonucleotides according to the sequence of the DNA template. The DNA helix reforms after the transcription process is complete.