Biology, Pages 82-91
Biology in clear, easy-to-read language
Biology is a comprehensive life science program for your reluctant readers and those who require additional help to grasp basic biological and life science concepts. This full-color, easy-to-read textbook addresses all these needs.
Written to meet national guidelines, students learn about classification and organization; patterns of reproduction, growth, and development; the human body's systems; ecological cycles; and other basic biological building blocks.
Lexile Level 840 Reading Level 3-4 Interest Level 6-12
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The only difference between these two sugars is that deoxyribose lacks an
oxygen atom on the second carbon in the ring ; hence its name . Because the
atoms in both the nitrogenous base and the sugar are numbered , the sugar
atoms have ...
Nucleotide Polymers Now we can see how these nucleotides are linked together
to build a polynucleotide . Adjacent nucleotides are joined by covalent bonds
called phosphodiester linkages between the OH group on the 3 ' carbon of one ...
5 ' carbon , and the other end has a hydroxyl group on a 3 ' carbon ; we refer to
these as the 5 ' end and the 3 ' end , respectively . So we can say that the DNA
strand has a built - in directionality along its sugarphosphate backbone , from 5 '