NSCI 1404 Study Guide - Midterm Guide: Okazaki Fragments, Dna Replication, Nucleic Acid Double Helix
25 Dec 2016
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Document Summary
Euchromatin- a region of dna that is uncoiled and undergoing active transcription into. Heterochromatin- densely staining condensed chromosomal regions, believed to be for the most part genetically inert. Chromatin3 that remains tightly coiled (and darkly staining) throughout the cell cycle. Double helix- the form of native dna, referring to its two adjacent polynucleotide strands wound into a spiral shape. Nucleotides- basic units of dna molecule, composed of a sugar, a phosphate, and one of. Complementary base pairing- adenine form hydrogen bonds with thymine, cytosine forms hydrogen bonds with guanine. Phosphodiester bonds- bonds that join nucleotides in nucleic acids. Antiparallel- the opposite arrangement of the sugar-phosphate backbones in a dna double helix. ribonucleic acid (rna)- part of the genetic material that organisms inherited from their parents. Helicase- an enzyme that untwists the double helix at the replication forks, separating the two parental strands and making them available as template strands.
