Chapter 8A DNA

Which of the following scientists experimented with bacteria that cause pneumonia and discovered a "transforming principle"?

• Frederick Griffith

• Oswald Avery

• James Watson

• Hershey Chase

Who identified DNA as the transforming principle?

• Rosalind Franklind

• Oswald Avery

• Francis Crick

• Colin MacLeod

Which scientists confirmed that DNA is the genetic material?

• Watson and Crick

• Avery, Macleod, and McCarty

• Hershey and Chase

• Chargaff and Franklin

Each of the following can be found in a nucleotide except

• phosphate groups

• sugars

• nitrogen-containing bases

• sulfide groups

How many rings are found in a purine?

• 1

• 2

• 3

• 4

Which nitrogen-containing base pairs with adenine?

• cytosine

• guanine

• thymine

• uracil

Which of the following statements is true regarding Erwin Chargaff?

• He suggested that DNA was a double helix of even width.

• He developed the base pairing rules for DNA.

• He confirmed that DNA is the transforming principle.

• He determined that DNA is the genetic material.

The nitrogen base pairs are held together by

• oxygen bonds

• nitrogen bonds

• hydrogen bonds

• disulfide bonds

Each of the following is true regarding the major and minor grooves except

• they cause the DNA to twist in indentations along the molecule

• they play a role in the activation of genes

• they help cells to undergo transcription

• the sides of DNA follow a pattern that alternates between major and minor grooves

Base pairs are said to be _______________ to each other.