DNA Structure and Replication Quiz

What part of a DNA molecule is being shown in the image?

• Nucleotide

• Deoxyribose

• Phosphate

• Nitrogen base

What part of the nucleotide is being shown by part "A" in the diagram?

• Nucleotide

• Deoxyribose sugar

• Phosphate

• Nitrogen base

What part of the nucleotide is being represented by "C" in the diagram?

• Nucleotide

• Deoxyribose

• Phosphate

• NItrogen base

What shape is DNA in?

• Single Helix

• Double Helix

• Triple Helix

• Oval

What type of organic macromolecule is DNA?

• Carbohydrate

• Protein

• Nucleic acid

• Lipid

Adenine will always pair up with what nitrogen base?

• Adenine

• Thymine

• Cytosine

• Guanine

Cytosine will always pair up with what nitrogen base?

• Adenine

• Thymine

• Cytosine

• Guanine

Why does the DNA have to replicate itself?

• To heal itself.

• So the DNA can be passed onto the new cells as they divide.

• DNA needs to replicate every 90 days.

• The DNA will break without replicating itself.

Which enzyme "unzips" the DNA by breaking the hydrogen bonds holding the nitrogen bases together?

• DNA Primase

• DNA Polymerase

• Helicase

• Ligase

Once the DNA is unzipped, the parent strand of DNA is used as a template to create the new (daughter) DNA. Because of this, DNA replication is called:

• Difficult

• Conservative

• Semi-conservative

• Democratic