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LECTURE PRESENTATIONS FOR CAMPBELL BIOLOGY, 9TH EDITION JANE B. REECE, LISA A. URRY, MICHAEL L. CAIN, STEVEN A. WASSERMAN, PETER V. MINORSKY, ROBERT B. JACKSON$17.99
LECTURE PRESENTATIONS FOR CAMPBELL BIOLOGY, 9TH ED
LECTURE PRESENTATIONS FOR CAMPBELL BIOLOGY, 9TH ED
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LECTURE PRESENTATIONS FOR CAMPBELL BIOLOGY, 9TH EDITION JANE B. REECE, LISA A. URRY, MICHAEL L. CAIN, STEVEN A. WASSERMAN, PETER V. MINORSKY, ROBERT B. JACKSON
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Course
LECTURE PRESENTATIONS FOR CAMPBELL BIOLOGY, 9TH ED
Institution
LECTURE PRESENTATIONS FOR CAMPBELL BIOLOGY, 9TH ED
LECTURE PRESENTATIONS
For CAMPBELL BIOLOGY, NINTH EDITION
Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Chapter 5
The Structure and Function of
Large Biological Molecules
,Overview: The Molecules of Life
• All living things are made up of four classes
of large biological molecules:
– carbohydrates,
– lipids,
– proteins, and
– nucleic acids
• Macromolecules
• are large molecules
• composed of thousands of covalently connected atoms
– Concept 2.3 ( for more information)
» A covalent bond is the sharing of a pair of valence
electrons by two atoms
,The Synthesis and Breakdown of Polymers
• Synthesis of polymer from monomers:
– By dehydration reaction
• when two monomers bond together ???
– through the loss of a water molecule
Dehydration removes
a water molecule,
forming a new bond.
1 2 3 4
Longer polymer
6
,• Breakdown of Polymers to monomers :
– By hydrolysis reaction
• the reverse of the dehydration reaction ??
– ----------------------------------------
7
,Figure 5.2b
(b) Hydrolysis: breaking down a polymer
1 2 3 4
Hydrolysis adds
a water molecule,
breaking a bond.
1 2 3
8
,The Diversity of Polymers
• Each cell has thousands of different
macromolecules
HO
• Macromolecules vary among
– cells of an organism,
– vary more within a species,
– and vary even more between species
• An immense variety of polymers can be built
from a small set of monomers
, Concept 5.2:
Carbohydrates serve as fuel and
building material
10
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