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Leading & Lagging DNA Strands quiz #2 Flashcards

Leading & Lagging DNA Strands quiz #2
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  • Why is one strand known as the lagging strand during DNA replication?
    The lagging strand is synthesized discontinuously in the opposite direction of the replication fork, forming Okazaki fragments that require multiple RNA primers.
  • Why is the new strand named the lagging strand?
    It is called the lagging strand because it is synthesized in short, discontinuous segments called Okazaki fragments, opposite to the direction of the replication fork.
  • Why is one of the strands of DNA considered 'leading' and the other considered 'lagging'?
    The leading strand is synthesized continuously in the same direction as the replication fork, while the lagging strand is synthesized discontinuously in the opposite direction.
  • What is true about the lagging strand during DNA replication?
    The lagging strand is synthesized in short segments called Okazaki fragments, each requiring an RNA primer, and is later joined by DNA ligase.
  • How is the leading strand of DNA synthesized?
    The leading strand is synthesized continuously in the same direction as the replication fork, requiring only one RNA primer.
  • Which strand or strands serve as a template for the lagging strand?
    The template strand for the lagging strand is the one that runs in the 5' to 3' direction opposite to the replication fork movement.
  • Why do we have a lagging strand during DNA replication?
    The lagging strand exists because DNA polymerase can only synthesize DNA in the 5' to 3' direction, necessitating discontinuous synthesis in the opposite direction of the replication fork.
  • Which two statements are true for the leading strand in DNA replication?
    1) The leading strand is synthesized continuously. 2) It requires only one RNA primer.
  • What is the lagging strand synthesized by?
    The lagging strand is synthesized by DNA polymerase in short segments called Okazaki fragments, each initiated by an RNA primer.
  • The 'leading strand' is the one where DNA polymerase can do what?
    The leading strand is where DNA polymerase can synthesize DNA continuously in the same direction as the replication fork.
  • Why is the lagging strand synthesized in a discontinuous fashion?
    The lagging strand is synthesized discontinuously because DNA polymerase can only add nucleotides in the 5' to 3' direction, opposite to the replication fork movement.
  • Which of the following is required to replicate the lagging strand of DNA? a) Single RNA primer b) Multiple RNA primers c) DNA ligase d) Continuous synthesis
    b) Multiple RNA primers and c) DNA ligase
  • Why is the DNA synthesis of the lagging strand considered discontinuous?
    It is considered discontinuous because it is synthesized in short segments called Okazaki fragments, each requiring a new RNA primer.
  • What is called the leading strand?
    The leading strand is the DNA strand that is synthesized continuously in the same direction as the replication fork.
  • Why are leading and lagging strand primers removed rather than joined with Okazaki fragments?
    Primers are removed because they are made of RNA, which is replaced with DNA to ensure the integrity and continuity of the DNA strand.
  • When comparing the leading and the lagging strand in DNA replication, what are the key differences?
    The leading strand is synthesized continuously with one RNA primer, while the lagging strand is synthesized discontinuously in Okazaki fragments, each requiring multiple RNA primers.
  • Why are there leading and lagging strands of DNA?
    There are leading and lagging strands because DNA polymerase can only synthesize DNA in the 5' to 3' direction, necessitating continuous synthesis for the leading strand and discontinuous synthesis for the lagging strand.
  • Which of the following is true about the elongation of the lagging strand? a) It is continuous b) It requires multiple RNA primers c) It forms Okazaki fragments d) It moves in the same direction as the replication fork
    b) It requires multiple RNA primers and c) It forms Okazaki fragments
  • What are the small segments synthesized in the lagging strand of DNA?
    The small segments are called Okazaki fragments.
  • Which strand grows continuously towards the replication fork?
    The leading strand grows continuously towards the replication fork.
  • What is the difference between the leading strand and the lagging strand in DNA replication?
    The leading strand is synthesized continuously in the direction of the replication fork, while the lagging strand is synthesized discontinuously in the opposite direction.
  • What is the term for the daughter strand synthesized continuously during DNA replication?
    The term is the leading strand.
  • How do the leading and the lagging strands differ?
    The leading strand is synthesized continuously with one RNA primer, while the lagging strand is synthesized in Okazaki fragments, each requiring multiple RNA primers.
  • When replicating the lagging strand, what is the process involved?
    The lagging strand is replicated in short segments called Okazaki fragments, each initiated by an RNA primer, and later joined by DNA ligase.
  • How are the leading and the lagging strands different?
    The leading strand is synthesized continuously in the same direction as the replication fork, while the lagging strand is synthesized discontinuously in the opposite direction.
  • What strand is opposite the leading strand?
    The lagging strand is opposite the leading strand.
  • Which DNA strand is synthesized continuously?
    The leading strand is synthesized continuously.