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14 Cards in this Set

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  • Back

Is DNA synthesized 5'->3' or 3'->5'?

5'->3'

What enzyme peels apart the 2 strands of DNA?

Helicase

Where does helicase attach on strands of DNA?

Specific sequences called Origins of Replication

What is SSB and what does it do?

Single strand DNA binding protein. It keeps the hydrogen bond from re-forming between the base pairs after Helicase has separated them.

What is the junction where the 2 strand have yet to be peeled apart called?

The Replication Fork

DNA polymerase 3 does what?

Creates the new DNA strands in a 5'->3' direction

What direction does the leading strand follow?

5'->3'

What are Okazaki fragments?

Fragments of complimentary DNA.

What does DNA polymerase 1 do?

Replaces the RNA primers with the appropriate nucleotides.

What does DNA ligase do?

Fuses together the Okazaki fragments

What does "DNA repair" consist of?

DNA polymerase 1 and 3 check over the DNA strands, cut out and replace the wrong ones, and finalize the molecule

Where is RNA found?

Nucleus, cytoplasm, and ribsomes

Why is RNA necessary?

It is transcribed from DNA to produce new proteins for cell function.

Why is DNA semi-conservative?

It retains one of its original strands of DNA in it reproduced one.