1.24 DNA Structure

Which of the following base pairs are correctly matched in DNA?

• Adenine - Cytosine

• Guanine - Thymine

• Adenine - Thymine

• Cytosine - Thymine

What type of bond holds the two strands of DNA together?

• Ionic bonds

• Covalent bonds

• Hydrogen bonds

• Metallic bonds

Which of the following is NOT a component of a nucleotide in DNA?

• Phosphate group

• Ribose sugar

• Deoxyribose sugar

• Nitrogenous base

If an organism contains 30% Adenine, what percent Cytosine does it have?

• 40%
• 10%
• 20%
• 80%

If an organism contains 10% Thymine, what percent Cytosine does it have?

• 40%
• 10%
• 20%
• 80%