DNA Structure

What is the primary structure of DNA?

• • A double helix

• • A single helix

• • A triple helix

• • A quadruple helix

Which of the following is a component of a nucleotide in DNA?

• • Ribose sugar

• • Deoxyribose sugar

• • Glucose

• • Fructose

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

• • Covalent bonds

• • Ionic bonds

• • Hydrogen bonds

• • Metallic bonds

In DNA, adenine pairs with which nucleotide?

• • Cytosine

• • Guanine

• • Thymine

• • Uracil

How are nucleotides in a single strand of DNA linked together?

• • Hydrogen bonds

• • Ionic bonds

• • Phosphodiester bonds

• • Van der Waals forces

Which of the following is not a nitrogenous base found in DNA?

• • Adenine

• • Uracil

• • Cytosine

• • Thymine

Which of the following pairs with cytosine in DNA?

• • Adenine

• • Guanine

• • Thymine

• • Uracil

Which of the following is a purine base found in DNA?

• • Adenine

• • Cytosine

• • Thymine

• • Uracil

What are the repeating units called that make up the DNA polymer?

• • Amino acids

• • Nucleotides

• • Polypeptides

• • Monosaccharides

Which base is replaced by uracil in RNA?

• • Adenine

• • Cytosine

• • Thymine

• • Guanine