Self Quiz for the Enzymes

Study the material in this section and then write out the answers to these question.
Do not just click on the answers and write them out. This will not test your understanding of this tutorial.

1. Define enzyme and state how enzymes are able to speed up the rate of chemical reactions. (ans)

2. Fill in the blanks.

Many enzymes require a nonprotein cofactor to assist them in their reaction. In this case, the protein portion of the enzyme, called an _______________ (ans), combines with the cofactor to form the whole enzyme or ____________ (ans). Some cofactors are ions such as Ca⁺⁺, Mg⁺⁺, and K⁺; other cofactors are organic molecules called _____________ (ans) which serve as carriers for chemical groups or electrons. Anything that an enzyme normally combines with is called a _____________ (ans).

3. Briefly describe a generalized enzyme-substrate reaction, state the function of an enzyme's active site, and describe how an enzyme is able to speed up chemical reactions. (ans)

3. State four characteristics of enzymes. (ans)

4. State how the following will affect the rate of an enzyme reaction.

a. increasing tempeature (ans)
b. decreasing temperature (ans)
c. pH (ans)
d. salt concentration (ans)

• RETURN TO "ENZYMES"