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15 Cards in this Set
- Front
- Back
Phages
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A virus that is parasitic in bacteria and reproduces until the bacterium is destroyed.
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Double Helix
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A pair of parallel helices intertwined about a common axis, such as the structure or a DNA molecule.
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Semiconservative Model
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Type of DNA replication in which the replicated double helix consists of one old strand, derived from the old molecule, and one newly made strand.
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Origins of Replication
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A particular sequence in a genome at which replication is initiated.
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Replication Fork
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Y-shaped regions of replicating DNA molecules where new strands are growing.
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DNA Polymerase
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The enzyme that links the complementary nucleotides together to form the newly synthesized strand.
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Leading Strand
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DNA strand that is synthesized in the 5' to 3' direction (towards the fork).
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Lagging Strand
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DNA strand that is discontinuously synthesized in the 3' to 5' direction.
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DNA Ligase
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Linking enzyme that catalyzes the formation of cavalent bonds between the Okazaki fragments and the growing chain.
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Primer
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A strand of nucleic acid that serves as a starting point for DNA synthesis.
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Helicase
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Enzyme that unwinds the double helix the expose the template.
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Mismatch Repair
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A system for recognizing and repairing incorrect insertions, deletions and mis-incorporations of bases that can arise during DNA replication and recombination.
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Nuclease
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An enzyme that cleaves the chains of nucleotides in nucleic acids into smaller units.
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Excision Repair
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Repair of damaged DNA by removal of the damaged segment of DNA and its replacement with a newly synthesized correct segment.
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Primase
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An enzyme that joins RNA nucleotides to make the primer.
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