U1 Test Review (V2): Scientific Processes, Biomolecules, and Enzymes
I. Biomolecules
Biomolecules are carbon-based macromolecules formed by joining repeating subunits called monomers. They form the basis
of all living things. Refer to pages 167-171 to complete the charts for each biomolecule.
II. Enzymes
Enzymes are a type of protein that acts like a catalyst, which speeds up chemical reactions. In the diagram below, refer to
page 160, Figure 18, of your Biology textbook and label the parts of the enzyme reaction. Describe what is occurring in
each step.
1. Label the
enzyme and
the substrate.
2. Label the image
and describe the
reaction.
2. Reaction description:
3. Label the image
and describe the
reaction.
3. Reaction description:
Enzymes are specific. Amylase breaks down ________________________________; Protease breaks down
___________________________; and Lipase breaks down __________________________. Enzymes work by
reducing the amount of ____________________________ needed to complete a reaction. In the diagram below,
label which line uses an enzyme and which line does not use an enzyme. Refer to page 159, Figure 17 to help with
labeling the diagram below.
Line A
Line A:
Line B:
Line B
List factors that can affect how fast enzymes
can work, and explain how this is related to
denaturing of the protein.
III. Summary of TEKS
2G: Analyze, evaluate, make inferences, and predict trends from data.
9A: Compare the structures and functions of different types of biomolecules, including carbohydrates, lipids,
proteins, and nucleic acids.
9C: Identify and investigate the role of enzymes.
9D: Analyze and evaluate the evidence regarding formation of simple organic molecules and their organization
into long complex molecules having information such as the DNA molecule for self-replicating life.
IV. Questions
1. Which of these diagrams best represents a section of the monomer of this enzyme?
B.
C.
A.
2. What is the name of the monomer that correctly identifies this structure?
3. What is the name of the monomer for this structure, and what is its function?
4. Describe how DNA and RNA are different.
5. Beeswax is which of the following types of organic molecule?
6. The function of biomolecules is directly related to the order of its monomers. Which biomolecule will be most affected by the order of its
monomers?
7.
The graph shows the rate of enzymatic reaction and how pH affects it. The optimum (best) pH for this enzyme is indicated on the graph.
a. What is the optimum pH?
b. What happens to enzyme after it reaches the optimum pH?
c. Identify the independent and dependent variables for the graph.