DNA Structure & History

Who is responsible for producing this image?

• Francis Crick
• James Watson
• Rosalind Franklin
• Watson and Crick

What is the official name of this image?

• Image 62

• Crystal Helix

• Photo 51

• Photo Franklin

What did Erwin Chargaff conclude from his experiments?

• Nitrogen bases are held together by extremely weak peptide bonds

• A and T always occur in equal amounts; C and G always occur in equal amounts

• Proteins are the carriers of genetic information and are considered to be the "true" genetic material

• C and G rarely occur in eukaryotic organisms but occur much more commonly in prokaryotes

From his work with mice and pneumonia-causing bacteria, Frederick Griffith discovered DNA's ability to undergo ____?

• Replication

• Transcription

• Transformation

• Translation

By using radioactive isotopes, Hershey and Chase were able to conclude that _____ is the carrier of genetic information.

• DNA
• Protein
• Carbohydrate
• Lipid

Erwin Chargaff developed the concept of:

• Protein synthesis

• DNA Transcription

• Hydrogen bonding

• Complimentary base pairing

What are the 4 nitrogen bases in DNA?

• adenine, thymine, cytoplasm, and guanine

• adenine, thymine cytosine, and guanine

• adenine, thymine, cytosine, and gylcerol

• adenine, thymine, cytosine, and glucose

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base
• sugar, oxygen, nitrogen base
• sugar, phosphate, nitrogen base
• sugar, phosphate, protein

Guanine always bonds with ______________.

• Adenine

• Guanine

• Cytosine

• Thymine

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose sugar and adenine
• deoxyribose sugar and a hydrogen bond
• deoxyribose sugar and the nucleus
• deoxyribose sugar and phosphate