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Protein Structure Homework
AP Biology
Adapted from CIBT “To Mix or Not to Mix” lab
1. It is astounding to discover the diverse roles of proteins in living systems. Using and citing a
reliable reference, look up “protein.” In the space below list five specific kinds of proteins. For
each protein, write one complete sentence that describes its function in a living organism.
1.
2.
3.
4.
5.
2. Proteins are made up of amino acids. Listed below is the general formula for an amino acid using
R to represent the side chain:
Draw a chain of three amino acids joined by peptide bonds. Be sure to include the bi-product
that is formed from the synthesis reaction.
3. The side chain, or R group of each amino acid can be classified as either “water-loving” or
“water hating” based on its structural formula. Using the given structural formulas for amino
acids below, circle whether each side chain is “water-loving” or “water-hating.”
4. Why is the chemical structure of proteins & their side groups important to the study of biology?
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