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Alisa McElroy

on 30 August 2012

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Transcript of Macromolecules


MACROMOLECULES MACRO micro Three of the FOUR biochemical macromolecules can be found on food nutrition labels .... Fat Carbohydrates Protein (0 grams in this product) (13 grams in this product) (9 grams in this product) What is the fourth? DNA eoxyribo ucleic cid OBJECTIVES what they do for living things

what they are composed of

how they may help the body gain energy to sustain life Carbohydrates ... MAIN source for the body to gain ENERGY

... get from PLANT foods

... TWO Types

... Most common monomer = GLUCOSE

they are our fuel!

CARBS = ENERGY fruits & vegetables
SUGAR comes from a plant and so does FLOUR (pasta, bread, candy, cookies...) SIMPLE COMPLEX ... made of 1 or 2 monomers
... taste sweet
... cookies, candy, fruit, cake, etc. ... polymer made of many monomers
... taste starchy
... whole grains, pasta, potatoes, bread, etc. Proteins ... STRUCTURAL molecules for growth and repair

... make up ENZYMES for helping chemical reactions

... get from ANIMAL foods

... also get from PLANT foods

.... Monomer = AMINO ACIDS
muscles, ligaments, tendons, bone, hair, nails, etc. speed up chemical reactions (catalysts)
if you didn't have them in your stomach, the food would rot in your stomach because the process would take so long meat, eggs, milk, cheese, etc. fruits, vegetables, grains and nuts Lipids ... STORED ENERGY

... INSULATE the body

... WATERPROOF surfaces of plants and animals

... get from PLANTS and ANIMALS

.... Monomer = TRIGLYCERIDES
these are WAXES oils (liquid) butter (solid) Glycerol + Fatty Acid Nucleic Acids ... carry GENETIC INFORMATION

... not obtained from food

... Monomer = NUCLEOTIDE Macromolecule Lab I. EGGS Observe the egg. On your paper describe what you see.

After Acetic Acid (vinegar) is added to the egg, what happened?

What macromolecules in the egg changed due to the vinegar? II. Flaming Hot! Observe the cheese puff and marshmallow. Record your observations on your paper.

Which food product burned more? Why?

Which product contained more energy? III. Macromolecule Review On your paper, list 3 examples of foods that contain:

1. Protein
2. Carbohydrates
3. Lipids

Which foods contain the most energy per gram? Big Scary Science Word! LARGE Molecules containing CARBON monosaccharide
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