Meselson and stahl also showed that the two strands of a dna double helix can be separated from each other using heat. what important tool in biology depends on this property of dna? what is one modern application of this tool?

The heating of a solution containing DNA leads to the unwinding of the double-stranded DNA. This happens when the Hydrogen bonds holding the two strands together become weak and break. This process of the separation of the double-stranded DNA into individual strands is called DNA melting or DNA denaturation.

The modern tool of polymerase chain reaction or the PCR machine uses this process to separate the strands to enable the replication of DNA.

this protocol describes a detailed procedure for intracellular flow cytometry staining.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.