DNA Structure and Function Assignment

Where is DNA found in the cell?

• Endoplasmic Reticulum

• Cytoplasm

• Mitochondria

• Nucleus

What are the three parts of a nucleotide?

• Sugar, Phosphate, Lipid

• Sugar, Nitrogen Base, Phosphate

• Sugar, Protein, Nitrogen Base

• Protein, Phosphate, Nitrogen Base

How many different nitrogen bases are there in DNA?

• 2

• 4

• 3

• 5

Which nitrogen base pairs with adenine in DNA?

• Cytosine

• Guanine

• Uracil

• Thymine

What is the ratio of purine to pyrimidine bases in DNA according to Chargaff's rule?

• 2:1

• 4:1

• 3:1

• 1:1

Who helped Watson and Crick develop their model of the double helix?

• James Watson

• Erwin Chargaff

• Maurice Wilkins

• Rosalind Franklin

What is the shape of DNA according to Watson and Crick?

• Single Strand

• Spiral

• Triple Helix

• Double Helix

What makes up the sides of the DNA ladder?

• Nitrogen Bases

• Just Phosphates

• Hydrogen Bonds

• Phosphates and Deoxyribose

How many hydrogen bonds are there between adenine and thymine in DNA?

• Three

• One

• Four

• Two

Think about the rules for base pairing found in the slideshow. For each of the following nitrogen bases, you must type the correct base pair into your answer box. Remember, each letter only has one partner!

ATC CCA GTA