14 - DNA and Replication (AP Bio)

Which of the following statements is TRUE regarding DNA replication?

• both sides of the DNA ladder are copied at the same time and at the same speed
• one of the original strands of DNA is conserved in the process
• the process occurs near the ribosomes in the cytoplasm of the cell
• the process is error-proof

Which of the following is responsible for the creation of Okazaki fragments during replication?

• The two sides of the DNA ladder are not symmetrical
• Single strand binding proteins only attach to one side of the strand
• DNA helicase can only influence one side of DNA
• DNA polymerase can only travel in the 3’ to 5’ direction

Which enzyme is responsible for unzipping (or unwinding) the DNA molecule?

• Helicase
• DNA polymerase
• Ligase
• DNA primase

The arrow on the image indicates which end?

• 3'
• 5'

Consider the base pair rule when answering this question. If a sample of DNA is 30% adenine, what % of the sample would you expect to be cytosine. (There is math involved here!)

• 10
• 20
• 50
• 70

The photo taken by Rosalind Franklin provided what clue for Watson and Crick?

• the way bases paired
• the helix shape of the molecule
• the hydrogen bond locations
• the anti-parallel arrangement

In the Hershey-Chase experiment, radioactive phosphorous was found in newly created phages. This supported which hypothesis?

• DNA was in the form of a double helix.
• DNA could be transformed into harmful variants.
• DNA was the molecule of heredity.
• DNA contained equal amount of thymine and adenine.

Which of the following images most accurately illustrates DNA replication?

• A
• B
• C
• D

Which type of mutation does not change an organism's phenotype despite changing it's genotype?

• missense
• nonsense
• silent
• frameshift

Each time a cell divides, the telomeres:

• decrease in number
• decrease in size
• increase in number
• increase in size