DNA Structure and History

What is the shape of DNA?

• three nucleotides wind around each other and form a triple helix

• two strands twisted called in a double helix

• a single stranded spiral

• a curve in three-dimensional space.

Adenine always pairs with

• Uracil

• Guanine

• Cytosine

• Thymine

The sides of the DNA ladder are (2 answers here!)

• hydrogen

• deoxyribose (sugar)

• phosphate

• purine

Tags

NGSS.HS-LS1-1

Guanine always pairs with

• Urical

• Cytosine

• Adenine

• Thymine

What is the complementary sequence:

C A T T A G

• G T A C U G

• G T A A T C

• G T C C T A

• T G C C G T

DNA is composed of repeating sub-units called

• phosphate group

• nucleotides

• nitrogenous base

• 5-carbon sugar

What are the 4 bases that make up the rungs of the DNA ladder?

• adenine, guanine, thymine, cytosine

• xanthine, cafeine, cytarabine, gemcitabine,

• hypoxanthine, theobromine, fluorouracil, paclitaxel

• adenine, guanine, cytosine, urical

Who is responsible for producing this image?

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

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil

How did Rosalind Franklin's photo affect the work of Watson and Crick?

• It was used to determine the structure of DNA

• It was used to identify the four bases that make up DNA

• It was used to determine the theory of independent assortment

• It was used to show DNA was the molecule of inheritance