Download What is the chemical makeup?

Carbohydrate
Examples:
Starches and sugars:
What do they do? Store energy and used as building
blocks for structure (example wood is just a long chain
of sugars connected together)
What is the chemical makeup?
C6H12O6 Where have you seen this molecule before?
Test: Lugar’s Iodine turns black when it comes in
contact with a starch. Drop a sample of Lugar’s Iodine
on a cracker, a piece of paper, and a piece of plastic.
Sketch the results in your journal.
Amino Acids
Examples:
Proteins
What do they do? Everything. Just kidding, but no
really. Proteins do all the work in your body. Enzymes
molecules and make chemical reactions happen, they
provide structure, receptor signals, transport molecules,
and we could go on forever …
What is the chemical makeup?
Amino acids are make-up of carbon and nitrogen
Test: Biurets Solution turns purple in the presence of
proteins. Add ~2cm of water and ~2cm of egg solution
to 2 test tubes. Add 20 drops biurets to each. Record
your results in your notebook.
Nucleic Acids
Examples:
DNA and RNA:
What do they do? Store and transfer genetic
information
What is the chemical makeup?
Each molecule is made up of a sugar, a phosphate, and
a nitrogenous base?
Test: Please draw a sketch of the DNA molecule on this
page.
Lipids
Examples:
Fats, oils, waxes, phospholipids, steroids
What do they do? Create cell membranes and lots of
other stuff. They act as messengers, helping proteins
do their jobs. Help control growth, immune function,
reproduction and other aspects of basic metabolism.
They are also non-polar so they are soluble with nonpolar vitamins, such as vitamin A,D, E, and K.
What is the chemical makeup?
Lipids are long hydrocarbon chains (guess what two
elements they are made up of? A phospholipid, is a
special kind of lipid made of a polar head, and 2 nonpolar tails.
Test: Draw a phospholipid in your chart. Compare the
paper bag at your station. One side was sprayed with
water, the other a common lipid. Draw both and note
differences you see.