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6 Cards in this Set
- Front
- Back
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DNA replication is when |
Two new strands are identical to original |
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Semi conservative replication process |
DNA helicase enzyme unzips and separate two strands of double helix structure by breaking hydrogen bonds between bases Free activated nucleotides are attracted to complementary unpair bases on template and H bond form Once nucleotides are lined up , DNA polymerase enzyme join them up with phosphodiester bonds Two new strands of DNA are produced Each with one old strand and one new strand of DNA |
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Why is there continuous and discontinuous replication |
DNA polymerase only bind to 3’ end but DNA only unwind in one direction so result in leading and lagging strand |
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How is the lagging strand replicated ? |
add RNA primer which is extended by DNA polymerase to form Okazaki fragments DNA ligase join the Okazaki fragment |
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What is special about the genetic code? |
It is universal as same sequence of bases code for same amino acid in all organisms |
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What is special about the triplet code ? |
It is degenerate because each amino acid is code for by more than one codon 64 different codons but only 20 amino acids |
