DNA chapter 13

Which of the following best describes a DNA molecule?

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

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

The two strands of nitrogenous bases in DNA are joined by which type of bond?

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

The drawing shows the structure of what molecule?

• A DNA molecule
• A lipid molecule
• A carbohydrate molecule
• A protein molecule

What does DNA stand for?

• Deoxyribonucleic acid
• Denitrogenous acid
• Deribonucleic acid
• Diribonucleic acid

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

DNA can determine...choose ALL correct answers

• how tall we will be

• our risk for disease

• hair color

• eye color

A nucleotide is made up of the following: choose all correct answers

• sugar

• phosphate

• nitrogenous

• carbohydrate

The pneumonic used to remember which nitrogenous bases pair is:

• apple tree; car garage

• cold apple; guava tree

• top coat; giant ant

• carrot top; aunt gertie

How many chromosomes are found in each of our somatic (body) cells?

• 23

• 46

• 92

• 1