DNA TEST STUDY GUIDE
1. What is this a picture of?
• Nucleotides
2. If a sample of DNA were found to contain 20 percent
cytosine, what percentage of adenine would be in this
sample?WHY?
• Cytosine always pairs with guanine, so the
percentage of guanine would also be 20
percent. Adenine pairs with Thymine so the
percentage would be 30%.
3. Describe how a DNA molecule
makes a copy of itself.
• The DNA molecule first splits down the
middle, separating the paired bases. Then the
bases on each strand pair up with other
nucleotides according to Chargaff’s
rules.Adenine always pairs with thymine, and
guanine always pairs with cytosine. This
process creates two identical DNA molecules.
4. Short Essay Where is it worse to have a mutation, on
a strand of DNA or a strand of your RNA? Why?
• Vocabulary to use mutation, DNA, RNA,
transcription, translation to amino acid and
protein
5. Understand a complementary
strand of DNA sequence
• Apply Chargaff’s law
6. A code for a given amino acid
consists of how many bases?
• three
7. What materials make up each nucleotide in a
DNA molecule?
• A sugar, phosphate and a base
8. Which is NOT a step in making a
protein?
• Transfer molecules deliver amino acids to the
nucleus
9. What can cause a mutation in DNA?
• X Rays
• Ultraviolent radiation
• Radioactivity
10. What does a group of three bases
code for the production of?
• One amino acid
11. What can cause sickle cell anemia?
• A change in the order of bases in a person’s
DNA
12. In DNA there are four types of?
• bases
13. What part of the DNA molecule
attaches to amino acids?
• bases
14. What is the molecule shown
below?
15. Show how to break down a DNA
sequence into codons.
• Remember groups of three
16. What does this illustration
represent? A helical DNA molecule
17. What does this illustration
represent?
• Protein
18. Understand the difference
between mutations
• Deletion
• Insertion
• Substitution