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Biology 9 > DNA replication > Flashcards

DNA replication Flashcards

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1
Q

What is DNA replication?

A

making an exact copy of a DNA molecule

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2
Q

What are the three steps?

A

1- unwind
2-unzip
3-reproduce

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3
Q

How does DNA copy?

A

DNA always copies 5’ to 3’

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4
Q

How fast does DNA replication happen?

A

replication happens 2,000 bp/sec

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5
Q

What happens during unwinding?

A

DNA unwinds to its loosest form

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6
Q

What happens during unzipping?

A

the two strands come apart at the base pairs (breaking hydrogen bonds)

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7
Q

What happens during reproducing?

A

the exposed bases on each strand bond with free nucleotides in the nucleus according to the base pairing rules

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8
Q

DNA replication enzymes

A

helicase and plymerase

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9
Q

Helicase

A

unwinds and unzips the DNA molecule (breaks hydrogen bonds between the base pairs) to expose the bases on each strand

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10
Q

DNA plymerase

A

allows free nucleotides (A, T, C, G) to bond to the exposed bases on each strand according to the base pairing rules

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Biology 9 (8 decks)

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