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Biology 12
Mr. Ciardullo
Name: ____________________ Date: __________ Block: _____
2.6 Proteins
Protein Functions
1.
What are 5 functions of proteins in the body?
a. _________________________________________
b. ___________________________________________
c. ______________________________________________________________
d. ______________________________________________________________
e. ______________________________________________________________
2. What are 3 functions of the proteins in the plasma membrane?
a. ______________________________________________________________
b. ______________________________________________________________
c. ______________________________________________________________
3. What do enzymes do in the body? ____________________________________________
_____________________________________________________________________
Amino Acids
4. Proteins are polymers made up of ____________________ monomers
5. In the diagram of an amino acid below, circle and label the following: amino group, acidic
group, R group.
6. Amino acids differ from one another in ______________________________
Protein Polymers
7. Amino acids join to form polymers through in a reaction called _______________ synthesis
8. A bond that joins 2 amino acids is called a ____________________.
9. A molecule formed when 2 amino acids join together is called a _______________.
10. A chain of amino acids joined together is called a ________________________
11. The diagram below shows two amino acids. Complete the diagram to show how they join
through condensation synthesis to form a dipeptide + water. Circle and label the peptide bond
that joins the two amino acids.
+
R
R
12. In a peptide bond, the electrons are shared in such a way that oxygen has a _____________
charge, and hydrogen has a _______________ charge. In the diagram below, show the
charges in the peptide bond.
13. Explain why hydrogen bonding can happen between the individual amino acids if a polypeptide
chain is folded __________________________________________________________
_____________________________________________________________________