8.2 DNA Structure

Which sequence of DNA bases would pair with this partial strand ATGTGACAG

• ATGTGACAG

• TACACTGTC

• GTAAGTGAC

• CATTCACTG

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

Which of the following units are repeatedly joined together to form a strand of DNA?

• amino acids
• nucleotides
• fatty acids
• polysaccharides

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

Why is DNA important?

• it is very small and very complicated
• it's in everything
• it serves as the blueprint for traits of all living things
• because we eat it every day for energy

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

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

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

• Francis Crick
• James Watson
• Rosalind Franklin
• Watson and Crick