DNA History and Structure

What is the primary genetic material shared by all living organisms?

• Lipids

• DNA

• Proteins

• RNA

In Griffith's experiment, what caused the harmless rough strain of bacteria to become deadly?

• Sulfur

• Proteins

• Transforming factor

• Heat-killed smooth strain

What did the Hershey-Chase experiment prove about DNA?

• RNA is the hereditary material

• Proteins are the hereditary material

• DNA is the hereditary material

• DNA is made of sulfur

Chargaff discovered that in a sample o DNA, the percentage of Adenine was equal to ______, and the percentage of Cytosine was equal to ______.

• Guanine, Thymine

• Cytosine, Guanine

• Thymine, Guanine

• Cytosine, Thymine

What is the shape of DNA in eukaryotic chromosomes?

• Circular

• Linear

• Square

• Triangular

What is the term for DNA that does not code for genes in eukaryotic cells?

• Junk DNA

• Active DNA

• Plasmid DNA

• Protein DNA