© cengage learning 2015 - principles of biology 103...hydrophilic “head” (acidic carboxyl...
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A B
CONDENSATION HYDROLYSIS
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hydrophilic “head” (acidic carboxyl group)
hydrophilic “tail”
A stearic acid (saturated)
B linoleic acid, omega-6 (unsaturated)
C linolenic acid, omega-3 (unsaturated)
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one layer of lipids
phosphate group
Phospholipid molecule
hydrophilic head
two hydrophobic
tails
one layer of lipids
A lipid bilayer
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amine group
R group
carboxyl group
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methionine
valine
methionine – valine
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RNA (a nucleic acid)
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ATP (a nucleotide) base (adenine)
phosphate groups