Biology Chapter on DNA Replication

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Questions and Answers

Which enzyme unwinds the DNA helix during replication?

  • RNA primase
  • DNA ligase
  • DNA polymerase
  • Helicase (correct)

Which enzyme synthesizes the RNA primer during DNA replication?

  • DNA polymerase
  • Helicase
  • RNA primase (correct)
  • Ligase

Okazaki fragments are found on which strand during DNA replication?

  • Leading strand
  • Lagging strand (correct)
  • Sense strand
  • Antisense strand

Which enzyme joins Okazaki fragments during DNA replication?

<p>DNA ligase (D)</p> Signup and view all the answers

In which direction does DNA polymerase add nucleotides during DNA replication?

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

What happens during the elongation phase of DNA replication?

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

Which phase marks the end of mitosis with the formation of two nuclei?

<p>Telophase (D)</p> Signup and view all the answers

How many daughter cells are produced in meiosis?

<p>4 (D)</p> Signup and view all the answers

Which cell structure is critical for chromosome separation during mitosis and meiosis?

<p>Spindle fibers (B)</p> Signup and view all the answers

What is the significance of genetic variation created by meiosis?

<p>Enables genetic diversity essential for evolution (B)</p> Signup and view all the answers

Flashcards

Enzyme unwinds DNA

Helicase unwinds the DNA double helix during replication.

RNA primer maker

RNA primase synthesizes RNA primers.

Okazaki fragments strand

Okazaki fragments are on the lagging strand during DNA replication.

Okazaki joiner

DNA ligase joins Okazaki fragments.

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DNA polymerase direction

DNA polymerase adds nucleotides 5’ to 3’ during replication.

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DNA replication elongation

DNA polymerase adding new nucleotides.

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Mitosis end phase

Telophase is the final phase of mitosis, where two nuclei form.

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Meiosis daughter cells

Meiosis produces 4 daughter cells.

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Chromosome separation key

Spindle fibers are essential for chromosome separation in mitosis and meiosis.

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Meiosis variation

Meiosis creates genetic variation, important for evolution.

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