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AP Biology Chapter 16 The Molecular Basis of Inheritance Flashcards

Campbell Reece Biology 6th edition

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294461466transformation(1) the conversion of a normal animal cell to a cancerous cell
294461467bacteriophagea virus that infects bacteria (phage)
294461468phagea virus that infects bacteria (bacteriophage)
294461469double helixthe form of native DNA, referring to its two adjacent polynucleotide strands wound into a spiral shape
294461470semiconservative modeltype of DNA replication in which the replicated double helix consists of one old strand, derived from the old molecule, and one newly made strand
294461471origins of replicationsites where the replication of a DNA molecule begins
294461472replication forka Y-shaped region on a replication DNA molecule where new strands are growing
294461473DNA polymerasean enzyme that catalyzes the elongation of new DNA at a replication fork by the addition of nucleotides to the existing chain
294461474leading strandthe new continuous complimentary DNA strand synthesized along the template strand in the mandatory 5'-->3' dirrection
294461475lagging stranda discontinuously synthesized DNA strand that elongates in a direction away from the replication fork
294461476DNA ligasea linking enzyme essential for DNA replication; catalyzes the covalent bonding of the 3' end of a new DNA fragment to the 5' end of a growing chain
294461477primeran already existing RNA chain bound to template DNA to which DNA nucleotides are added during DNA synthesis
294461478primasean enzyme that joins RNA nucleotides to make the primer
294461479helicasean enzyme that untwists the double helix of DNA at the replication fork
294461480single-strand binding proteinduring DNA replication, molecules that line up along the unpaired DNA strands, holding them apart while the DNA strands serve as templates for the synthesis of complimentary strands of DNA
294461481mismatch repairthe cellular process that uses special enzymes to fix incorrectly paired nucleotides
294461482nucleasea team of enzymes that hydrolyze DNA and RNA into their component nucleotides
294461483nucleotide excision repairthe process of removing and then correctly replacing a damaged segment of DNA using the undamaged strand as a guide
294461484telomereThe protective structure at each end of a eukaryotic chromosome. Specifically, the tandemly repetitive DNA at the end of the chromosome's DNA molecule.
294461485telomeraseAn enzyme that catalyzes the lengthening of telomeres. The enzyme includes a molecule of RNA that serves as a template for new telomere segments.

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