DNA Replication Review

What is the first step of DNA replication?

• Separation of the two DNA strands

• Unwinding of the double helix

• Synthesis of new DNA strands

• Formation of hydrogen bonds between nucleotides

What enzyme is responsible for unwinding the DNA double helix during replication?

• ligase

• ribonuclease

• polymerase

• helicase

What are the two strands of DNA called during replication?

• top strand and bottom strand

• A strand and B strand

• fast strand and slow strand

• leading strand and lagging strand

What is the role of DNA polymerase in replication?

• It has no role in DNA replication

• It breaks down the existing DNA strands

• It helps in transcribing RNA from DNA

• Catalyzes synthesis of the complementary strand of DNA

What is the function of the primer in DNA replication?

• Stops DNA replication

• Speeds up DNA replication

• Initiates DNA replication

• Prevents DNA replication

What is the difference between the leading and lagging strands during replication?

• The leading strand is synthesized in the 3' to 5' direction, while the lagging strand is synthesized in the 5' to 3' direction.

• The leading strand is synthesized with RNA primers, while the lagging strand is synthesized without RNA primers.

• The leading strand is synthesized discontinuously, while the lagging strand is synthesized continuously.

• The leading strand is synthesized continuously, while the lagging strand is synthesized discontinuously.

What is the role of DNA Polymerase I?

• Initiation, DNA repair

• Elongation, replaces the primer with dNTP/fills in gaps in lagging strand

• Entire DNA replication process, primary enzyme of DNA synthesis

• DNA Polymerase I does not exist

What is the purpose of DNA ligase in replication?

• To unwind the DNA double helix

• To synthesize RNA primers for DNA polymerase

• To join the Okazaki fragments on the lagging strand

• To proofread the newly synthesized DNA

What is the end result of DNA replication?

• Two completely different DNA molecules

• One copy of the original DNA molecule

• Two identical copies of the original DNA molecule

• A mix of the original and new DNA

What are the three main stages of DNA replication?

• Initiation, Elongation, Termination

• Start, Middle, End

• Beginning, Middle, Conclusion

• Commencement, Extension, Finish