DNA's shape is a

• Double Helix

• Single Helix

• Circle

• Square

The 4 bases of DNA are:

• Adenine

• Cytosine

• Prupine

• Thymine

• Guanine

Adenine pairs with _______

• Guanine

• Adenine

• Thymine

• Cytosine

Guanine pairs with _______

• Guanine

• Adenine

• Thymine

• Cytosine

Cytosine pairs with _______

• Guanine

• Adenine

• Thymine

• Cytosine

Thymine pairs with _______

• Guanine

• Adenine

• Thymine

• Cytosine

If a sample has 20% guanine, how much cytosine is present?

• 30%

• 60%

• 20%

• 80%

If a sample has 60% Thymine, how much Adenine is present?

• 30%

• 60%

• 20%

• 80%

What two molecules connect together to form the backbone of DNA?

• Phosphate

• Nitrogenous Base

• Hydrogen bond

• Sugar

5' means the ________ of the DNA strand.

• beginning

• end