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4.3: DNA Structure and Replication

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

base pair

Pair of nucleotide bases (A-T or G-C) that form the middle of the DNA molecule.

Chargaff’s rules

Observations by Erwin Chargaff that concentrations of the four nucleotide bases differ among species; and that, within a species, the concentrations of adenine and thymine are always about the same and the concentrations of cytosine and guanine are always about the same.

double helix

Double spiral shape of the DNA molecule.

semi-conservative

DNA replication process where half of the parent DNA molecule is conserved in each of the two daughter DNA molecules.

DNA replication

Process of copying DNA prior to cell division.

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Difficulty Level:
At Grade
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Date Created:
Feb 24, 2012
Last Modified:
Sep 04, 2016
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SCI.BIO.323.L.1