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at the starting of the first round of elongation the initiation codon aug is positioned in the p site with fmet-trnafmet bound to it by
term translation or protein synthesis is quite similar in eukaryotes and prokaryotes we will look at the details of the process in prokaryotes and
in during translation the series of an mrna molecule is examined from its 5 end by ribosomes that then synthesize an appropriate polypeptide together
the genetic code is the group of rules by that information encoded within genetic material dna or mrna sequences is changed into proteins amino acid
transfer rna trna molecules play an very significant role in protein synthesis each trna becomes covalently
transfer rna which is also known as trna is an adaptor molecule composed of rna classically 73 to 93 nucleotides in length which serves as the
in at least single eukaryote tetrahymena the pre-rrna molecule holds an intron erasing of the intron in running
each ribosome having of two subunits a small subunit and a large subunit every of that is a multi component
rrna ribosomal ribonucleic acid is the rna part of the ribosome the cell structure which is the site of protein synthesis in all living cells the
gene repressor proteins which inhibit the transcription of particular genes in eukaryotes also exist they may act by binding either to control parts
unlike dna binding domains and dimerization domains no general structural motifs have since been identified
dna binding domains called as basic domains rich in basic amino acids that was happen in transcription factors in combination with zipper
while various positive control components lie close to the gene they regulate additional can be situated long
the protein synthesis is very significant because it is by the use of genetic information to synthesize proteins in which the genes in the dna are
each of the three eukaryotic rna polymerases has more subunits or 12 and so these are big complex enzymes the genes encoding some of the subunits of
the general mechanism of rna synthesis by these eukaryotic rna polymerases is the same as for the prokaryotic enzyme that is the
the eukaryotic transcription is more difficult than prokaryotic transcription for example in eukaryotes the genetic material dna and therefore
the trp tryptophan operon which is shown in the figure will have five structural genes encoding enzymes for tryptophan
normal 0 false false false en-in x-none x-none microsoftinternetexplorer4 the lac operon is an brilliant example of
normal 0 false false false en-in x-none x-none microsoftinternetexplorer4 various protein-coding genes in bacteria are
transcription continues until a termination series is reached the most common termination signal is a gc-rich
as in several fields of molecular biology studies of e coli have gives the model for subsequent investigations of transcription in eukaryotic cells
the basic parts of rna are the same than for dna with two major differences the pyrimidyne base uracil exchange thymine and ribose replace
the eukaryotic cells have five several dna polymerases alpha beta gamma delta or epsilon the dna polymerases contained in replication of chromosomal
the life of a eukaryotic cell can be explained as a cell cycle mitosis and cell division happens in the m phase that lasts for only about 1 h this is