classifying macromolecules macromolecules are placed into groups based on their chemical composition...
TRANSCRIPT
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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
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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
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Proteins are Super Important
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Structure
Proteins are made of carbon, hydrogen, oxygen, and nitrogen
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Structure
They are polymers made of monomers of amino acids
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Size
Proteins are very large ,often made of thousands of amino acids
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Amino Acids
There are 20 different amino acids. All proteins are made from combinations of these amino acids.
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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?
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Other Names
Sometimes people call proteins polypeptides because they are made of many amino acids linked by peptide bonds
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Structure
When all of the amino acids are assembled in a chain, the protein will fold itself into a very specific shape.
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Structure
The shape of a protein often determines its function.
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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.
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3 Major Functions of Proteins
Some proteins help transport materials in and out of cells
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3 Major Functions of Proteins
Some proteins form important cell structures
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3 Major Functions of Proteins
Some proteins, known as enzymes, control the rate of reactions and regulate processes
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Testing Procedure
Add Biuret solutionBlue means no proteinPurple means proteins are present
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Question Answer
How do you test for proteins?
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