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DNA Replication

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DNA Replication Answer Key

1. 
Use the diagram of DNA replication to answer the questions.
DNA Replication
A. 
Which part of the DNA fragment is represented by the letter "a"?
DNA Replication
  1. Okazaki fragment
  2. replication fork
  3. template strand
  4. leading strand
B. 
Which part of the DNA fragment is represented by the letter "b"?
DNA Replication
  1. replication fork
  2. RNA primer
  3. Okazaki fragment
  4. leading strand
C. 
Which part of the DNA fragment is represented by the letter "c"?
DNA Replication
  1. leading strand
  2. RNA primer
  3. lagging strand
  4. template strand
D. 
Which part of the DNA fragment is represented by the letter "d"?
DNA Replication
  1. replication fork
  2. lagging strand
  3. RNA primer
  4. template strand
E. 
Which part of the DNA fragment is represented by the letter "f"?
DNA Replication
  1. leading strand
  2. lagging strand
  3. Okazaki fragment
  4. RNA primer
F. 
Which part of the DNA fragment is represented by the letter "e"?
DNA Replication
  1. lagging strand
  2. RNA primer
  3. Okazaki fragment
  4. leading strand
2. 
The enzymes responsible for the unwinding of the double helix during the process of replication are called helicases.
3. 
Enzymes called DNA polymerases catalyze the synthesis of new DNA by adding nucleotides to the preexisting chain.
4. 
What is the relationship between DNA replication and the S phase of the cell cycle?
  • DNA synthesis takes place during the S phase of interphase, between the G1 and G2 parts of the cell cycle. Therefore, DNA replication is completed before the mitotic phase begins.
5. 
What structures complete the ends of the new DNA strands after replication has been completed?
  1. DNA polymerase III
  2. nucleases
  3. replication forks
  4. telomeres

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