DNA Semi-conservative replication Flashcards

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1
Q

What enzyme unzips DNA and how does it do it? (First stage of replication)

A
  • DNA Helicase
  • Breaks hyrdogen bonds between complementary bases
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2
Q

What happens in the second stage after DNA has been unzipped?

A

Free nucleotides are attracted to the exposed bases by complementary base pairing

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3
Q

What enzyme joins nucleotides to complementary bases, through what bonds, and to form what?

A
  • DNA polymerase
  • Phosphodiester bonds
  • Forms a sugar-phosphate backbone
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4
Q

Using the fourth and final step, explain why this replication is semi-conservative

A
  • Each DNA molecule has 1 old and 1 new strand
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