DNA History

Front

What did Erwin Chargaff conclude from his experiments?

Back

A and T, C and G always occur in equal amounts.

Front

What is the carrier of genetic information according to Hershey and Chase?

Back

DNA.

Front

Why did scientists initially think the information carrying molecule was protein and NOT DNA?

Back

Because there was more of it.

Front

What did Erwin Chargaff's work help Watson and Crick determine?

Back

The rules of nitrogen base pairing.

Front

What discovery did Frederick Griffith make from his work with mice and pneumonia-causing bacteria?

Back

Transformation.

Front

What are the four nitrogen bases found in DNA?

Back

Adenine (A), Thymine (T), Cytosine (C), Guanine (G).

Front

What is the structure of DNA?

Back

A double helix.

Front

What is the role of DNA polymerase in DNA replication?

Back

It synthesizes new DNA strands by adding nucleotides.

Front

What is the significance of the 1953 Watson and Crick model of DNA?

Back

It provided the first accurate structure of DNA, explaining how genetic information is stored and replicated.

Front

What is Chargaff's rule?

Back

In DNA, the amount of adenine equals thymine, and the amount of cytosine equals guanine.