Biology DNA 12.1 review

Who provided clear x-ray crystallography images of DNA?

• Watson & Crick

• Franklin

• Wilkins

• Pauling

• Chargaff

Discovered that there was the same amount of A and T in a cell, and C and G in a cell.

• Watson & Crick

• Franklin

• Wilkins

• Pauling

• Chargaff

Built models to determine that DNA was a double helix shape with base pairs A-T and G-C in rungs between the sugar/phosphate backbone of DNA.

• Watson & Crick

• Franklin

• Wilkins

• Pauling

• Chargaff

Tags

NGSS.HS-LS1-1

A pair of parallel strands that twist together about an axis

• nucleotide

• double helix

• base pair

• esther bonds

basic structural unit of DNA. Examples: adenine, guanine, cytosine, thymine

• nucleotide

• phosphate

• ribose sugar

• enzyme

5 carbon sugars and phosphates linked together through chemical bonds to provide the structural framework for nucleotides

• chromosome

• nucleotide

• phosphate-sugar backbone

• enzyme

Base pairs (correctly matched)

• A-G and C-T

• A-C and G-T

• A-T and G-C

• C-A and T-G

Who was responsible for the experiment depicted by the image/data table?

• Oswald Avery, et. al.
• Watson and Crick
• Erwin Chargaff
• Frederick Griffith

If Chargaff found that a sample of DNA has 20% ADENINE, how much THYMINE would he have determined to be there?

• 30%

• 20%

• 80%

• 60%

Which scientist studied bacteria that caused pneumonia that was tested in mice.

• Watson

• Chargaff

• Avery

• Griffith