Life ScienceGrade 9-11
DNA Analysis Answer Key
Use gel electrophoresis to analyze DNA fragments and solve a crime using DNA fingerprinting techniques.
Prior Knowledge Questions
Q1.What does DNA stand for?
Answer
DNA stands for Deoxyribonucleic Acid.
Q2.What are the four nitrogen bases found in DNA?
Answer
Adenine (A), Thymine (T), Guanine (G), and Cytosine (C).
Q3.What is gel electrophoresis used for?
Answer
Gel electrophoresis is used to separate DNA fragments by size using an electric current.
Activity A – Gel Electrophoresis
Q1.Which direction do DNA fragments move during electrophoresis?
Answer
DNA fragments move toward the positive electrode (anode) because DNA is negatively charged.
Q2.Do smaller or larger DNA fragments travel farther in the gel?
Answer
Smaller fragments travel farther because they move more easily through the gel matrix.
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