A strand of DNA that looks like a twisted ladder is called a _____________________

• triple twist
• corkscrew
• double helix
• chain reaction

To____________________ is to make copies of DNA

• replicate
• recycle
• reuse
• rejoice

What is the name of the sugar found in DNA?

• ribose

• sucrose

• glucose

• deoxyribose

Where is DNA found in the cell?

• nucleus

• vacuole

• ribosome

• endoplasmic reticulum

What are the "sides" of a DNA molecule made up of?

• adenine and thymine

• guanine and cytosine

• sugar and phosphates

• nitrogen bases

What are the "steps/rungs" of the DNA ladder made up of?

• sugars

• phosphates

• nitrogen bases

• deoxyribose

Which type of bond holds nitrogen bases together in a DNA molecule?

• hydrogen bonds

• nitrogen bonds

• carbon bonds

• helium bonds

A change or mistake in a DNA sequence is called a

• tumor

• mutation

• replication

• chromosome

According to Chargaff's rules, the amount of adenine in a DNA molecule always equals the amount of

• cytosine

• guanine

• thymine

• uracil

According to Chargaff's rules, the amount of cytosine in a DNA molecule always equals the amount of

• adenine

• guanine

• thymine

• uracil