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Macromolecules
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Organic Compounds
• Compounds that contain CARBON are called ________.
• ____________ are large organic molecules.
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Carbon (C)
• Carbon has 4 electrons in outer shell.
• Carbon can form covalent bonds with as many as 4 other atoms (elements).
• Usually with __, __, __ or __. • Example: CH4(methane)
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Macromolecules
• Large organic molecules. • Also called ________. • Made up of smaller “building blocks” called __________.
• Examples: 1. __________ 2. __________ 3. __________ 4. Nucleic acids (DNA and RNA) 4
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Question: How Are
Macromolecules Formed?
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Answer: Dehydration Synthesis
• Also called “_______________”
• Forms polymers by combining monomers by “__________ water”.
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HO H
HO HO H H
H2O
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Question: How are
Macromolecules Separated or Digested?
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Answer: Hydrolysis
• Separates monomers by “__________ water”
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HO HO H H
HO H
H2O
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Carbohydrates
Elements C : H : O 1 : 2 : 1
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Carbohydrates
• Small sugar molecules to large sugar molecules.
• Examples: A. __________ B. __________ C. __________
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Carbohydrates
Monosaccharide: _________
Examples: glucose (________)
deoxyribose
ribose
Fructose
Galactose
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glucose
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Carbohydrates
Disaccharide: ____ sugar unit
Examples: –Sucrose (glucose+fructose)
–Lactose (glucose+galactose)
–Maltose (glucose+glucose)
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glucose glucose
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Carbohydrates Polysaccharide: many sugar units
Examples: ______ (bread, potatoes)
______ (beef muscle)
______ (lettuce, corn)
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glucose glucose
glucose glucose
glucose glucose
glucose glucose
cellulose
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Lipids Elements
C, H, O no ratios
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Lipids • General term for compounds which are
__________ in water. • Lipids are soluble in hydrophobic solvents. • Remember: “stores the ____ energy” • Examples: 1. ________ 2. ________ 3. ________ 4. ________ 5. Steroid hormones 6. Triglycerides
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Lipids
Six functions of lipids: 1. ________ energy storage 2. Protection against heat loss (_________)
3. Protection against __________ 4. Protection against __________ 5. Chemical messengers (__________) 6. Major component of membranes (__________)
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Lipids
Triglycerides: composed of __________ and __________
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H
H-C----O
H-C----O
H-C----O
H
glycerol
O
C-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH3
fatty acids
O
C-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH3
O
C-CH2-CH2-CH2-CH
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Fatty Acids There are two kinds of fatty acids you may see these on
food labels: 1. Saturated fatty acids: __ double bonds (bad) 2. Unsaturated fatty acids: double bonds (good)
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O
C-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH3 saturated
O
C-CH2-CH2-CH2-CH unsaturated
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Proteins
Elements C, H, O, N, S
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Proteins (Polypeptides) • __________ (20 different kinds of aa)
bonded together by peptide bonds (__________).
• Six functions of proteins: 1. ___________ : albumin (egg white) 2. ___________ : hemoglobin 3. ___________ : hormones 4. ___________ : muscles 5. ___________ : membranes, hair, nails 6. ___________ : cellular reactions
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Proteins (Polypeptides)
Four levels of protein structure:
A. __________ Structure
B. __________ Structure
C. __________ Structure
D. __________ Structure
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Primary Structure
__________ bonded together by peptide bonds (__________)
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aa1 aa2 aa3 aa4 aa5 aa6
Peptide Bonds
Amino Acids (aa)
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Secondary Structure
• 3-dimensional folding arrangement of a primary structure into _____ and ____ held together by __________.
Two examples:
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Alpha Helix
Beta Pleated Sheet
Hydrogen Bonds
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Tertiary Structure • Secondary structures ____ and ______ into a more complex 3-D arrangement of linked polypeptides
• Bonds: H-bonds, ionic, disulfide bridges (S-S)
• Call a “subunit”.
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Alpha Helix
Beta Pleated Sheet
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Quaternary Structure • Composed of 2 or more “__________” • __________ in shape • Form in Aqueous environments • Example: enzymes ( _______ )
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subunits
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Nucleic Acids Elements
C, H, O, N, P
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Nucleic acids
• Two types: a. Deoxyribonucleic acid ( __________________ ) b. Ribonucleic acid ( __________________ ) • Nucleic acids are composed of long
chains of ____________ linked by dehydration synthesis.
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Nucleic acids • Nucleotides include: __________________ __________________ __________________: adenine (A) thymine (T) DNA only uracil (U) RNA only cytosine (C) guanine (G)
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Nucleotide
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O
O=P-O
O
Phosphate
Group
N Nitrogenous base
(A, G, C, or T)
CH2
O
C1 C4
C3 C2
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Sugar
(deoxyribose)
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DNA - double helix
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P
P
P
O
O
O
1
2 3
4
5
5
3
3
5
P
P
P O
O
O
1
2 3
4
5
5
3
5
3
G C
T A