Chapter 6: DNA: The Molecule of Life

Chapter 6: DNA: The Molecule of Life
Module 6.1 DNA is a polymer of nucleotides.
Answer the following questions as you read the module:
1. The molecule of heredity is .
2. Which of the following is used to construct a molecule of DNA?
A) Chromosomes
B) Nucleotides
C) Double helix
D) Carbohydrates
3. Complete the following diagram of a DNA molecule by filling in the complementary bases.
A
T
T
G
A
C
4. Match the following terms with their appropriate descriptions: double helix, nucleic acid, nucleotide, backbone.
A) Molecules that contain information to make proteins
B) Consists of a base, five-carbon sugar, and a phosphate
C) Structure of a double-stranded molecule of DNA
D) Identical among all DNA molecules
5. Complete the following diagram that illustrates the structure of a nucleotide.
image1.wmf
6. Overall, a molecule of DNA has a negative charge. Which component of DNA gives it this charge?
7. A gene is a specific section of DNA that contains the instructions to make a protein. If all molecules of DNA contain a
phosphate group, a deoxyribose, and a base, propose an explanation for how the information to make a protein is coded within the
DNA molecule.
8. If thymine makes up 20% of the bases in a DNA double helix, what percentage of the bases is guanine?
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