Semi Conservative
The rule used to join free nucleotides to the exposed bases of DNA is base pairing. Adenine pairs with thymine, and guanine pairs with cytosine through hydrogen bonding. This complementary base pairing ensures the accurate replication of DNA during cell division.
DNA replication is a semi-conservative process. The DNA is split into two strands. Nucleotides are then attached to each strand by complementary base pairing, where A attaches to T and G attaches to C. The newly formed strand is hence identical to the old strand and the base sequence of DNA can hence be conserved during replication.
Specific base pairing makes DNA replication possible. Because of how the bases pair up (A-T, G-C) the 2 strands come together like a molecule 'zipper'. The 2 strands of DNA unwinds and is copied following the base pair rule. This creates newly synthesised DNA strands complimentary to the parental strands. This produces 2 new double helix daughter strands, each containing one original and one new strand. This is called semi-conservative replication.
DNA replication is described as semi-conservative. The reason is because semi-conservative replication would produce two copies that each contained one of the original strands and one entirely new strand.
Two new DNA copies are like the original DNA because they contain the same genetic information and sequence of nucleotides as the original DNA. This means that they hold the same instructions for building and functioning of cells in an organism.
I think there is a mistake in the question. The DNA replication is said to be semi-conservative because during DNA replication one stand will be parental and the other will be newly formed. This happens due to the complimentary base pairing.
I'm not an expert on this subject but as I've learned, DNA is split into two replication forks where the complimentary base pairs and other backbones are added on, so ideally it would be 50% of the original strand in each daughter strand.
The base pairings are ALWAYS the same; where Adenine pairs with Thymine and Guanine pairs with Cytosine. As long as there is one strand of DNA with these bases as templates, the other strand can always be determined. DNA replication always uses an old strand and uses it as the template for creating the new strand. Ex: ATTGCCGTAAT is the old strand of DNA. The complimentary strand is TAACGGCATTA. The base pairings will always be the same because of the DNA polymerase which checks the pairings and fixes any mistakes. It is very rare for mistakes to occur.
DNA replication is semi-conservative, meaning each new DNA molecule contains one strand from the original template and one newly synthesized strand. It occurs through a series of steps including unwinding of the double helix, formation of replication forks, and synthesis of new strands using complementary base pairing. The process is highly accurate due to proofreading mechanisms that help correct errors during replication.
Transcription involves the synthesis of RNA from a DNA template, and this process can only occur when the DNA double helix is unzipped. Unzipping the DNA allows the RNA polymerase enzyme to access one of the DNA strands for transcription by breaking the hydrogen bonds between the base pairs. This process exposes the genetic information in the DNA sequence and allows for the complementary base pairing necessary for RNA synthesis.
Semi-conservative refers to the mechanism of DNA replication where each new DNA molecule contains one original strand and one newly synthesized strand. This process ensures that the genetic information is preserved and passed on accurately during cell division.
The complementary relationship between the sequences of nucleotides lead to the discovery of DNA replication. After discovery of this relationship it became easier to understand how the bases of nucleotides pair up during replication and so they became easier to duplicate.