DNA Structure & History

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

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 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

Which organelle is DNA usually found in?

• cell membrane
• vacuole
• ribosome
• nucleus

What are the three components of a nucleotide?

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

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

Adenine bonds with ______________.

• Guanine
• Thymine
• Cytosine
• Adenine

What is the shape of DNA?

• triple helix

• single stranded

• double helix

• braided spiral

What does DNA stand for?

• Deoxyribonucleic acid
• Denitrogenous acid
• Deribonucleic acid
• Diribonucleic acid