DNA: Structure and Function of DNA Lesson

DNA Timeline 

When was DNA discovered? How was it discovered? Who discovered it?

Check out the timeline below for information on these questions and more.

DNA Recap

What is the structure and function of DNA?

Watch the presentation below to find out.

Watch the following video from Garland Science Publishing titled The Structure of DNA.

RNA Notes

See description of diagram Links to an external site.

Structure and Function Challenge and Before You Go

Practice Time! Use the knowledge you learned from the lesson to complete the practice activities below.

Answer Key Links to an external site.

Before You Go - You Need To Know

The following key points are from the explore section of the lesson. You must know the following information before moving to the next lesson. This is just a summary of the key points.

1. Compare and contrast DNA and RNA.
   • DNA is double-stranded, while RNA is single-stranded.
   • DNA contains Thymine, while RNA contains Uracil.
   • DNA stays in the nucleus, while RNA travels throughout the cytoplasm.
2. What bases belong to the Purines and Pyrimidine groups?
   • Adenine and Guanine are Purines.
   • Thymine and Cytosine are Pyrimidines.
3. What are the three types of RNA?
   • mRNA (messenger), rRNA (ribosomal), nad t RNA (transfer)

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