DNA Structure

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

Which organelle is DNA usually found in?

• cell membrane

• vacuole

• ribosome

• nucleus

Nucleotides are made up of a sugar, phosphate, and..?

• nitrogenous base

• nucleic acid

• cholesterol

• fatty acid

Guanine bonds with ______________.

• Adenine

• Guanine

• Cytosine

• Thymine