DNA Structure Review

Which of the following best describes the shape/structure of a DNA molecule?

• double helix

• contains ribose

• made of amino acids

• contains Uracil

A DNA molecule is composed of repeating nucleotides. What is a nucleotide consisted of?

• A phosphate, sugar and nitrogenous base

• A protein, protein and Guanine

• A phosphate, Adenine, and nitrogenous base

• A protein, Adenine and nitrogenous base

Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG

• ATG TGA CAG

• TAC ACT GTC

• GTA AGT GAC

• CAT TCA CTG

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine

• guanine

• thymine

• uracil

Guanine bonds with ______________.

• Adenine

• Guanine

• Cytosine

• Thymine

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose sugar and adenine

• deoxyribose sugar and a hydrogen bond

• deoxyribose sugar and the nucleus

• deoxyribose sugar and phosphate

Watson and Crick were the first to suggest that DNA is _____

• a short molecule

• the shape of a double helix

• a protein molecule

• the genetic material

Who is responsible for producing this image (taken by X-ray chrystallography)?

• Francis Crick

• James Watson

• Rosalind Franklin

• Watson and Crick

What determines the code, or information, of a DNA molecule?

• the shape (structure) of the nitrogen bases

• the order (sequence) of the nitrogen bases

• the color of the nitrogen bases

• the frequency (number) of nitrogen bases

Which shows the correct complementary base pairing for DNA?

• C-A, T-G

• A-G, C-T

• C-G, U-A

• T-A, G-C