Chemical Basis of Life
ZOOL 1
Lecture 3 1
2
¡
¡ ¡ ¡
Chemical substances that cannot be broken down to simpler forms by ordinary chemical reactions Atom Atomic number Atomic mass Compound Molecule Macromolecule 3
¡ ¡ ¡
ELEMENT Oxygen Carbon Hydrogen Nitrogen Calcium Phosphorus Potassium Sulfur Sodium Chlorine Magnesium Manganese Iron Copper Iodine
SYMBOL O C H N Ca P K S Na Cl Mg Mn Fe Cu I
ATOMIC NO. 8 6 1 7 20 15 19 16 11 17 12 25 26 29 53
ATOMIC MASS 16 12 1 14 40 31 39 32 23 35 24 55 56 64 127
% WET WEIGHT OF BODY* 65 19 10 3 1 1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Lifted from Miller & Harley, 1999 4
97 %
3 %
1) Organic Compounds ¡ Contain carbon (C) and hydrogen (H) ¡ Carbohydrates, lipids, proteins, nucleic acid 2) Inorganic Compounds ¡ Do not contain carbon and hydrogen ¡ Ex. Salt, water, carbonates, acids, bases
5
a. Carbohydrates b. Proteins c. Lipids d. Nucleic acids
6
¡ Compounds that contain only C, H, and O
¡ Most abundant organic cpd. in nature ¡ Synthesized from
water and carbon
Lecture 3 1
2
¡
¡ ¡ ¡
Chemical substances that cannot be broken down to simpler forms by ordinary chemical reactions Atom Atomic number Atomic mass Compound Molecule Macromolecule 3
¡ ¡ ¡
ELEMENT Oxygen Carbon Hydrogen Nitrogen Calcium Phosphorus Potassium Sulfur Sodium Chlorine Magnesium Manganese Iron Copper Iodine
SYMBOL O C H N Ca P K S Na Cl Mg Mn Fe Cu I
ATOMIC NO. 8 6 1 7 20 15 19 16 11 17 12 25 26 29 53
ATOMIC MASS 16 12 1 14 40 31 39 32 23 35 24 55 56 64 127
% WET WEIGHT OF BODY* 65 19 10 3 1 1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Lifted from Miller & Harley, 1999 4
97 %
3 %
1) Organic Compounds ¡ Contain carbon (C) and hydrogen (H) ¡ Carbohydrates, lipids, proteins, nucleic acid 2) Inorganic Compounds ¡ Do not contain carbon and hydrogen ¡ Ex. Salt, water, carbonates, acids, bases
5
a. Carbohydrates b. Proteins c. Lipids d. Nucleic acids
6
¡ Compounds that contain only C, H, and O
¡ Most abundant organic cpd. in nature ¡ Synthesized from
water and carbon