How did Watson and Crick make a useful inference from Franklin's X-ray studies of DNA?

Rosalind Franklin's X-ray pattern showed that the distance between the two strands of a DNA molecule is the same throughout the length of the molecule. How did that information help Watson and Crick determine how bases are paired?

Describe the discoveries that led to the modeling of DNA.

What is the role of DNA polymerase in the process of DNA replication?

A scientist uses radioactive nitrogen to label the nitrogenous bases of the DNA of a cell. Then the DNA is allowed to replicate, and the new strands take up non- radioactive bases. Do one, both, or neither of the daughter cells have radioactive DNA? Explain.

What is the role of DNA polymerase in DNA replication?

Rosalind Franklin's X-ray patterns showed that the distance between the two phosphate-sugar "backbones" of a DNA molecule is the same throughout the length of the molecule. How did that information help Watson and Crick determined how the bases are paired?

What important clue from Rosalind Franklin’s work helped Watson and Crick develop their model of DNA?

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

Now work with your group to share the passages from the selection that you found especially important. Take turns presenting your passages. Discuss what you notice in the selection, what questions you asked, and what conclusions you reached.

Which of the following best compares hyphae and gametangia in fungi?

a. Hyphae transport water and nutrients, while gametangia store spores.

b. Hyphae produce spores, while gametangia develop into gametes.

c. Hyphae release enzymes to break down food, while gametangia produce gametes.

d. Hyphae provide structure and support, while gametangia release spores.

How did Hershey and Chase use radioactivity to draw a conclusion about proteins and DNA?

What did the experiments of Griffith and Avery show about genetic information?

What did Mendel conclude determines biological inheritance?