An RNA primer.
The first nucleotide must be attached to a short RNA primer to provide a free 3' hydroxyl group for DNA polymerase to extend from. DNA polymerase starts adding nucleotides to this RNA primer to begin DNA replication.
There are 64 (4^3) different possible base sequences in a nucleotide chain that is three nucleotides in length. This is because there are 4 possible nucleotide bases (A, T, C, G), and each position in the sequence can be occupied by any one of these 4 bases.
The substitution of nucleotides in the mouse may not change its physical characteristics because many nucleotide substitutions do not alter the amino acid sequence of proteins. Also, not all changes in DNA lead to changes in phenotype because some mutations may occur in non-coding regions of the genome. Additionally, the phenotype of an organism is the result of a complex interplay of many genes and environmental factors, so the effect of a single nucleotide substitution may be negligible.
Laxu's answer made no sense so I deleted it. Next time Laxu please contribute something that makes some grain of sense. Only RNA primers can be used because DNA polymerase cannot add nucleotides without an existing 3-OH' to build on. RNA can be added to an existing template without this requirement and is then used by the DNA polymerase to initiate the strand.
The most common position for esterification of a phosphate group on a pentose nucleotide is the 5' carbon of the sugar. This is because it is the primary site for linking nucleotides in DNA and RNA chains.
For DNA polymerase to link nucleotides together, the first nucleotide must be attached to a primer, which is a short segment of RNA or DNA that provides a free 3' hydroxyl group for the DNA polymerase to start adding nucleotides. DNA polymerase can only extend nucleotides from an existing primer or strand, using it as a template for complementary base pairing.
The first nucleotide must be attached to a short RNA primer to provide a free 3' hydroxyl group for DNA polymerase to extend from. DNA polymerase starts adding nucleotides to this RNA primer to begin DNA replication.
DNA polymerase moves in the 5' to 3' direction during DNA replication because it can only add new nucleotides to the 3' end of the growing DNA strand. This is because the enzyme requires a free 3' hydroxyl group to form a bond with the incoming nucleotide.
This question is strange because nucleotides make up DNA.
Any polymerase (DNA or RNA) works in the 5`-3` direction (downstream) because the 3` end contains the hydroxyl groups. The 5` phosphate binds covalently with the 3` hydroxyl group forming a phospho diester linkage.
A DNA polymerase can only add nucleotide monomers to the 3' end of a growing DNA strand, meaning it works in a 5' to 3' direction. This is because the enzyme can only add nucleotides to the hydroxyl group on the 3' carbon of the sugar molecule.
RNA polymerase is the enzyme responsible for linking RNA nucleotides together during transcription. It catalyzes the formation of phosphodiester bonds between nucleotides to create a single-stranded RNA molecule.
A gene, because any smaller and it would just be nucleotides.
DNA polymerase requires a primer to initiate the synthesis of new DNA strands because it can only add nucleotides onto an existing strand of DNA. The primer provides a starting point for the polymerase to begin adding nucleotides and building the new DNA strand.
DNA polymerase can only synthesize DNA in the 5' to 3' direction because it can only add nucleotides to the 3' end of the growing DNA strand. This is due to the structure of the DNA molecule and the way the nucleotides are arranged.
DNA polymerase III .
Every codon is three nucleotide pairs, so you would have 25 codons.