DNA History, Structure, and Replication

What did Erwin Chargaff conclude from his experiments?

• Nitrogen bases are held together by peptide bonds
• A and T, C and G always occur in equal amounts
• Proteins are the carriers of genetic information
• C and G rarely occur in eukaryotic organisms

The work of Erwin Chargaff allowed Watson and Crick to determine the rules of...

• protein synthesis
• transcription
• hydrogen bonding
• nitrogen base pairing

Rosalind Franklin's "Photo 51" allowed Watson and Crick to determine the ___ of DNA.

• Shape
• Backbone
• Nitrogen bases
• Hydrogen bonds

What was Watson and Crick's main scientific accomplishment?

• Building the first accurate model of DNA
• Isolating strains of pneumonia causing bacteria
• Determining base pairing rules
• Discovering the process of genetic transformation

Tags

NGSS.HS-LS1-1

Cytosine is an example of a single-ringed nitrogen base called...

• Purine
• Peptide
• Ribose
• Pyrimidine

If a sample of DNA has 20% ADENINE, how much GUANINE will it have?

• 30%
• 20%
• 80%
• 60%

The image, which includes a 5-carbon sugar, phosphate, and a nitrogenous base, illustrates which of the following structures?

• Amino acid
• Nucleotide
• Protein
• Peptide Bond

From his work with mice and pneumonia-causing bacteria, Frederick Griffin discovered ________.

• Replication
• Transcription
• Transformation
• Translation

By using radioactive isotopes, Hershey and Chase were able to conclude that __ is/are the carrier(s) of genetic information.

• DNA
• Proteins
• Carbohydrates
• Lipids

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

A pyrimidine (single ring nitrogen base) always pairs with a purine (double ring nitrogen base).

• True
• False