FHS DNA Structure Study Guide

Adenine, Thymine, Cytosine, and Guanine are all examples of

Cytosine is complementary with

Guanine is complementary with

What are the 4 nitrogen bases?

• adenine, thymine, cytoplasm, and guanine
• adenine, thymine cytosine, and guanine
• adenine, thymine, cytosine, and gylcerol
• adenine, thymine, cytosine, and glucose

What bonds the two sides of a DNA strand together

• Non-Polar Molecule

• Nucleotide

• Hydrogen Bond

• Polar Molecule

What enzyme breaks the Hydrogen Bonds in DNA Replication

• Lactase

• Helicase

• DNA ligase

• DNA Polymerase

If 35% of an organism's DNA is Thymine, what percentage is Guanine

• 15%

• 35%

• 70%

• 50%

Adenine is complementary to

Which of the following is NOT a Nitrogen Base found in the DNA molecule?

• Thymine

• Uracil

• Adenine

• Cytosine

Which of these are purines (larger nitrogenous bases?) CHOOSE 2

• Adenine

• Thymine

• Cytosine

• Guanine

Answer explanation

Here's a way to remember the purines:

pure As Gold (adenine & guanine)