DNA Replication

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Questions and Answers

In what part of the cell does DNA replication take place?

  • Ribosome
  • Golgi Apparatus
  • Cytoplasm
  • Nucleus (correct)

During which phase of the cell cycle does DNA replication occur?

  • S phase (correct)
  • G1 phase
  • G2 phase
  • M phase

What is the starting point of DNA replication called?

  • Replication fork
  • Telomere
  • Centromere
  • Replication origin (correct)

Which enzyme is responsible for creating a new strand using DNA as a template?

<p>DNA polymerase (B)</p> Signup and view all the answers

What are the structures formed when DNA splits during replication called?

<p>Replication forks (B)</p> Signup and view all the answers

What enzyme extends the new DNA strand at the replication fork?

<p>DNA polymerase (C)</p> Signup and view all the answers

In which direction does DNA replication occur?

<p>5' to 3' (B)</p> Signup and view all the answers

What are the short fragments synthesized on the lagging strand called?

<p>Okazaki fragments (C)</p> Signup and view all the answers

What principle describes how each new DNA molecule consists of one old and one new strand?

<p>Complete replication (C)</p> Signup and view all the answers

Which of the following is true about DNA replication in eukaryotes?

<p>It occurs simultaneously at multiple sites. (A)</p> Signup and view all the answers

Flashcards

Where does DNA replication take place?

The location in eukaryotic cells where DNA replication occurs.

When does DNA replication occur?

DNA replication happens during this specific phase of the cell cycle.

What is the replication origin (Ori)?

The specific site where DNA replication starts; DNA splits here forming replication forks.

What do DNA polymerases do?

Enzymes that are critical for synthesizing new DNA strands during replication.

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What are replication forks?

The Y structure formed when DNA strands separate at the replication origin.

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DNA Polymerase

Enzyme that adds nucleotides to the 3' end of an RNA primer during DNA replication, matching the template strand.

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Leading vs. Lagging Strand

DNA is synthesized continuously along one strand and discontinuously in fragments on the other.

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Okazaki Fragments

Short DNA fragments synthesized on the lagging strand during DNA replication.

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Semi-Conservative Replication

Each new DNA molecule consists of one original (old) strand and one newly synthesized strand.

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Multiple Replication Initiation Sites

Eukaryotic DNA molecules start replication at multiple points simultaneously.

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