Chemistry of Life Worksheet
Explore the fundamental chemical building blocks of life with this Grade 9 science worksheet on the Chemistry of Life, covering macromolecules, enzymes, and nucleic acids.
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Chemistry of Life: Grade 9 Science
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Read each question carefully and answer to the best of your ability. Show all work where applicable.
1. Which of the following is NOT one of the four major classes of macromolecules found in living organisms?
Carbohydrates
Nucleic Acids
Water
Proteins
2. Enzymes are a type of protein that function as biological:
Substrates
Catalysts
Inhibitors
Reactants
3. The primary function of carbohydrates in living organisms is to provide .
4. DNA stands for acid, and RNA stands for acid.
5. All enzymes function optimally at the same temperature and pH.
True
False
6. Lipids are hydrophilic molecules.
True
False
7. Briefly describe the structure of a DNA molecule. You may use the diagram below to assist your explanation.
8. Explain the 'lock and key' model of enzyme action.
Match each macromolecule with its primary function.
9. Carbohydrates
a. Genetic information storage
10. Lipids
b. Energy storage and cell membranes
11. Proteins
c. Quick energy source
12. Nucleic Acids
d. Structural support and enzymes
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