PROTEINS WORKSHEET
1. List five (5) functions of proteins along with an example of each.
2. What are the 4 main elements making up proteins? How many covalent bonds does each
of these elements form?
3. What are the monomers of proteins called? How many are there? Name the 4 things
bonded to the centre carbon of this monomer.
4. The main difference among amino acids is their ___________ group. What is the Rgroup on glycine? On alanine?
5. Differences in R-groups give different proteins different ______________.
6. How is a dipeptide formed?
7. What do you call the covalent bonds that hold amino acids together?
8. Long chains of amino acids are called ___________________ and these join together to
make a ________________.
9. What is the effect of temperature on protein shape? Give an example of this.
10. Hydrogen bonding among individual amino acids in a chain causes what effect on the
protein's shape?
11. Most proteins act as catalysts or __________________ inside of cells.
12. Sketch these two amino acids --- glycine & alanine. Circle the centre carbon, place a
triangle around the amino group, and put a box around the carboxyl group.
13. What do you call the covalent bonds that hold amino acids together? Put a box around
these bonds in the sketch you did on question 11.
14. A protein that has lost its precise three dimensional shape, has become_____________.
Three things that can cause a protein to become denatured are____, ____, and _____
15. Use the following words to describe the making of a protein (a term may be used more
than once): tertiary structure, hydrophobic interactions, water,-COOH, polypeptide
chain, Dehydration synthesis, -NH2, secondary structure, hydrogen bonding, covalent
bonds, helix, primary structure, peptide bonds
_____________ between amino acids joins –NH2 groups to -COOH groups (in the
process _____ molecules are removed) to form a _______. The bonds so formed are
called __________. The sequence of amino acids is called the ______. The _____ is
often in the form of an alpha helix, which is due to ________ between amino acids in the
chain. The _________ is the three dimensional shape of the protein as it folds back on
itself. This structure is held together by ________ , __________, and ______ between R
groups. The shape of the protein is determined by its ________ . The function of the
protein is determined by its __________.
Biochemistry of proteins
R. Kalloo
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