DNA Structure Review

Which of the following best describes a DNA molecule?

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

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

Nitrogenous bases are joined by which type of bond?

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

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base
• sugar, oxygen, nitrogen base
• sugar, phosphate, nitrogen base
• sugar, phosphate, protein

Cytosine always pairs with

• Adenine
• Thymine
• Uracil
• Guanine

Name this structure

• double helix
• nucelotide
• twisted ladder
• hydrogen bond

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

The two strands of DNA are held together by:

• Hydrogen Bonds
• Phosphodiester Bonds
• Glycolsyl Bonds
• Glycosidic Linkages

What is the complement to the DNA strand below:
5'-ATGCCAT-3'

• 5'-TACGGTA-3'
• 3'-TACGGTA-5'
• 3'-ATGGCAT-5'
• 5'-ATGGCAT-3'