classifying macromolecules macromolecules are placed into groups based on their chemical composition...
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Classifying Macromolecules
Macromolecules are placed into groups based on their chemical composition
The four types of macromolecules are Carbohydrates Proteins Lipids Nucleic Acids
Proteins
What foods do you think have protein in them?
Actually, all foods have at least a little, but some foods are higher than others
Proteins are Super Important
Structure
Proteins are made of carbon, hydrogen, oxygen, and nitrogen
Structure
They are polymers made of monomers of amino acids
Size
Proteins are very large ,often made of thousands of amino acids
Amino Acids
There are 20 different amino acids. All proteins are made from combinations of these amino acids.
Structure
Proteins are long chains of amino acids that are linked together through a special type of bond called a peptide bond.
What is this process called?
Other Names
Sometimes people call proteins polypeptides because they are made of many amino acids linked by peptide bonds
Structure
When all of the amino acids are assembled in a chain, the protein will fold itself into a very specific shape.
Structure
The shape of a protein often determines its function.
Structure
Proteins are very sensitive to changes in pH and temperature
Changes in pH and temperature change the shape of the protein, meaning that it probably won’t function correctly anymore.
3 Major Functions of Proteins
Some proteins help transport materials in and out of cells
3 Major Functions of Proteins
Some proteins form important cell structures
3 Major Functions of Proteins
Some proteins, known as enzymes, control the rate of reactions and regulate processes
Testing Procedure
Add Biuret solutionBlue means no proteinPurple means proteins are present
Question Answer
How do you test for proteins?
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