DNA Replication and Structure

Who developed the double-helix model of DNA?

• Watson & Crick

• Avery

• Hershey & Chase

• Franklin

Chargraff's Rule says that

• Adenine will be equal to Thymine

• Cytosine will be equal to Thymine

• Uracil will be equal to Guanine

• Adenine will be equal to Cytosine

If there is 37% guanine how much cytosine is there?

• 77%

• 47%

• 37%

• 57%

How did Rosalind Franklin's photo 51 affect th work of Watson and Crick?

• It was used to determine the physical structure of DNA

• It was used to identify the four bases that make up DNA

• It was used to determine the theory of independent assortment

• It was used to show DNA was the molecule of inheritance

Franklin used x-ray crystallography to determine the shape of the DNA molecule is

• a cloverleaf

• a braided rope

• a pleated sheet

• a twisted ladder

Who was responsible for determining the structure of DNA?

• Watson and Crick

• Chargaff

• Rosalind Franklin

• All of the above

Who discovered that A = T and C = G?

• Chargaff

• Franklin

• Watson & Crick

• Griffith

Who took a picture of DNA using X-ray diffraction?

• Rosalind Franklin

• Watson & Crick

• Oswald Avery

• Hershey & Chase

The enzyme that unzips the DNA to prepare for replication

• helicase

• replicase

• polymerase

• synthase

The picture below shows the steps of DNA replication beginning with step one and ending with step three.

​Because you are reusing the old, or parent, DNA strand DNA replication is said to be

• Semi- Conservative

• Semi-discontinuous

• Continuous

• Fully-Conserveative