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ORGANIC COMPOUNDS Chapter 2 Section 3.

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Presentation on theme: "ORGANIC COMPOUNDS Chapter 2 Section 3."— Presentation transcript:

1 ORGANIC COMPOUNDS Chapter 2 Section 3

2 Organic Compounds made of carbon atoms (with hydrogen and oxygen)
most molecules with carbon are organic exception: carbon dioxide, carbon monoxide Carbon has 4 valence electrons so readily forms 4 covalent bonds

3 Organic Compounds

4 CARBOHYDRATES COMPOSED OF : Functions: C, H, O in ratio of: 1:2:1
*Energy Source Simple carbohydrates Energy storage Complex carbohydrates Structural materials Cell surface markers

5 Carbohydrates exist as:
SIMPLE MONOSACCHARIDES GLUCOSE FRUCTOSE GALACTOSE DISACCHARIDES SUCROSE glucose & fructose MALTOSE glucose & glucose LACTOSE glucose & galactose COMPLEX POLYSACCHARIDES Made of 3 or more monosaccharides ANIMALS: GLYCOGEN LIVER PLANTS: STARCH CELLULOSE (wood)

6 GLUCOSE

7 GLYCOGEN

8 CELLULOSE

9

10 PROTEINS are large organic molecules (polymers) composed mainly of :
C, H, O, N (a little S) Building blocks (m0n0mers) are AMINO ACIDS ALL SHARE SAME BASIC STRUCTURE

11 Amino Acids Side Groups: Provide different shape Polar or Nonpolar

12 Functions of Proteins Structural Proteins Transport Proteins Enzymes
Hair, nails, hooves Transport Proteins Carry molecules through blood that otherwise would not be soluble in blood Carry ions or molecules across membranes Enzymes Catalyze all chemical reactions in body Specific to a single chemical reaction Muscles actin, myosin in all 3 muscle types

13 Peptide Bonds Form when 2 amino acids join in a synthesis reaction (condensation)

14 Types of Proteins Dipeptides Polypeptides A + B  AB
Long chains of amino acids In large proteins 2 to 4 polypeptide chains fold together Interact through hydrogen bonds or disulfide bridges

15 Protein Shape Determines function Influenced by: Temperature pH
Solvent

16

17 Lipids hydrophobic C H O NOT a polymer
long chains of carbon – carbon bonds with hydrogen; oxygen at end of molecule called fatty acids hydrophobic

18 LIPIDS are large, nonpolar organic molecules include: Triglycerides
Cholesterol Phospholipids Steroids Waxes Pigments

19 Functions of Lipids NRG storage insulation waterproofing protection hormones cell membranes

20 Fatty Acids Unbranched carbon chains that make up most lipids
one end has a carboxyl group so is hydrophilic other end is hydrocarbon so is hydrophobic Saturated Fatty Acids each C has only single covalent bonds Unsaturated Fatty Acids some C atoms have double covalent bonds which put kinks in the chain

21 Fatty Acids

22 Triglycerides composed of 3 molecules of fatty acid joined to 1 molecule of glycerol high melting points (solids at room temperature) butter, fat in red meat

23 Phospholipids have 2 fatty acid chains attached to a molecule of glycerol plus a phosphate group attached to the 3rd carbon in glycerol makes up most of cell membrane in a lipid bilayer are nonpolar so keeps most polar substances from crossing membrane

24 Waxes are a structural lipid
made of long fatty acid chain with a long alcohol chain are waterproof so act as protective layer in plants & animals

25 Steroids composed of 4 fused carbon rings with various functional groups attached includes many hormones Testosterone Estrogen Progesterone Adrenal hormones

26 NUCLEIC ACIDS very large, complex organic molecules (polymer)
subunit: nucleotides (monomers) C H O N P function: store & transfer genetic information examples: DNA: deoxyribonucleic acid genetic code essential for making proteins RNA: ribonucleic acid protein synthesis

27 Nucleotides 3 parts: 5 carbon sugar Phosphate group (- charge)
RNA: ribose DNA: deoxyribose Phosphate group (- charge) Nitrogenous base

28 NUCLEIC ACIDS DNA RNA

29 ATP adenosine triphosphate NRG molecule of cells
3 phosphate groups added to adenosine (a nitrogenous base) bond between 2nd & 3rd high NRG


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