Macromolecules - Dickinson ISD

advertisement
Macromolecules
Carbon Compounds

Carbon is an extremely versatile element.


It has 4 valence electrons allowing it to bond with
almost any other element.
It can bond to other Carbon atoms, allowing it
to form chains.


These carbon-carbon bonds can be single,
double or triple covalent bonds.
Chains can close up on themselves and form
rings.

Every living organism has carbon in it

Organic
Macromolecules


Large molecules made from thousands of
smaller molecules.
Formed by polymerization:



the building of large compounds by joining smaller
ones together.
Monomers- the smaller compounds.
Polymers- the larger compounds.

Four groups of macromolecules (organic
compounds)




carbohydrates
lipids
nucleic acids
proteins
3. Carbohydrates



Compounds made up of carbon, hydrogen
and oxygen atoms.
These atoms are usually in a ratio of 1:2:1.
Living things use carbohydrates as a main
source of energy.

Examples –


Plants
Animals
Two types of Carbohydrates

Monosaccharidessingle sugar molecules.

Examples:
 glucose and galactose


found in milk
Fructose

found in fruits

Polysaccharides- large sugars formed from
monosaccharides.

Examples: Starches

Glycogen


sugar storage molecule in animals
Cellulose

structural support in plants
4. Lipids




Made mostly from carbon and hydrogen
atoms.
Not soluble in water. (does not dissolve in
water)
Consist of fats, steroids, oils and waxes
Used to store energy.

Some are important
parts of biological
membranes and
waterproof coverings.
Two types of lipids

Saturated fats- all
carbons have the
maximum number of
hydrogens attached to
them.


Usually are solid at room
temperature
Ex: beef, lard, butter, milk
products

Unsaturated fatscontain at least one
carbon-carbon double
covalent bond.


Usually are liquid at room
temperature
Ex: cooking oils, nuts
5. Nucleic Acids



Made up of hydrogen,
oxygen, nitrogen, carbon
and phosphorus.
Formed from monomers
called nucleotides.
Nucleotides- When joined
together makeup the
structural units of DNA &
RNA.

Store and transmit hereditary or genetic
information.

RNA-ribonucleic acid


contains the sugar ribose.
DNA-deoxyribonucleic acid

contains the sugar deoxyribose
Proteins


Made up of nitrogen, carbon, hydrogen and
oxygen.
Formed from monomers called amino acids.
Examples of protein in nature:
Spider
Silk
Collagen
(in tennis
racket)
Hair
Feathers

Amino acids


Building blocks of
proteins
compounds with an
amino group (-NH2) on
one end and a carboxyl
group (-COOH) on the
other end with a side
chain called an “R-group”

Each protein has a specific role





regulates cell processes
Enzymes – speed up the rate of reactions
forming muscles and bones
transporting substances into or out of cells
fighting disease
Download