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BIOLOGY 2121 – LECTURE SHEET – PROTEINS
1. Proteins contain the following elements: ____________________________________
2. The body is _________________ % protein.
3. List several examples of proteins: ___________________________________
4. Draw and label the general structure of an amino acid below:
5. There are ________ different amino acids.
6. ____________ bonds are formed between amino acid. These bonds are formed via dehydration
reactions caused by the loss of ____________.
7. Many amino acids bonded together are called ___________________ chains.
8. Amino acids in a sequence form the ________________ structure of a protein.
9. The two secondary structures are called the _________________ and _________________. These
structures are stabilized by __________________ bonds.
10. The functional or 3D protein structure is called the _________________________.
11. One example of a quaternary structure of a protein is __________________.
12. Denaturation of proteins may be caused by
__________________________________________________.
13.A protein that exhibits only secondary structure and is insoluble are called ______________ proteins.
Examples are _____________________________.
14. ______________________ proteins have a tertiary structure and are soluble. Examples are
______________________________________________________________________________.
15. What does the term catalyst mean?______________________________________________________
16. Draw an enzyme and a substrate. Label the active site and substrate.