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Nucleic Acid set 2

Nucleic Acid Module set 2

DNA replication is semiconservative
DNA double helix denatures (strands separate),Each strand serves as the template for the synthesis of new second strand,and DNA polymerase adds complementary nucleotides in DNA replication
The nucleotide comes in as a triphosphate
bidirectional from a single origin of replication is the pattern of DNA synthesis in procaryotes
portion of the genome that contains an origin and is replicated as a unit replicon
bidirectional and multiple origins of replication is the pattern of DNA synthesis in eukaryotes
some small circular genomes (e.g., viruses and plasmids)replicated by rolling-circle mechanism
unzips the DNA helix helicase
synthesizes an RNA primer primase
adds bases to the new DNA chain; proofreading the chain for mistakes DNA polymerase III
removes primer, closes gaps, and repairs mismatches DNA polymerase I
supercoiling gyrase
uses each strand as template and synthesizes complementary strands DNA polymerase III
joins fragments to form complete strands of DNA ligase
the manner in which genetic instructions for polypeptide synthesis are stored within genome genetic code
sequence of base pairs in DNA corresponds to the amino acid sequence of polypeptide encoded colinearity
genetic code word and specifies an amino acid codon
codon meanings deciphered by Marshall Nirenberg
up to six different codons can code for a single amino acid code degeneracy
the 61 codons that specify amino acids sense codons
the three codons used as translation termination signals (UGA,UAG, UAA)and they do not encode amino acids stop codons
Created by: kprout