If a DNA sample contains 25 percent adenine (A), what percent of thymine, cytosine, and guanine must it contain? Use Chargaff's rule to construct your answer.

What facts about DNA does the Watson-Crick model explain?

List the chemical components of DNA.

Describe the discoveries that led to the modeling of DNA.

Four nucleotides make up DNA: adenine, cytosine, guanine, and thymine. These nucleotides always occur in pairs called base pairs. Answer the question: A= Adenine, C = Cytosine, G = Guanine, T = Thymine. Suppose a strand of DNA has the following code on one side. AGT CCA GTA What would be the matching other side of a DNA strand?

In the 1940s, many scientists were convinced that a protein was the genetic material. Refute this claim using the experiments in this lesson.