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DNA Structure and Replication

DNA Structure and Replication
How does ethidium bromide interact with DNA?

It binds to phosphate
It binds to adenine
It does not interact
It intercalates between bases

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DNA Structure and Replication
E.coli DNA polymerases II and III lack

partially 5' → 3' exonuclease activity
5' → 3' endonuclease activity
5' → 3' exonuclease activity
partially 5' → 3' endonuclease activity

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DNA Structure and Replication
Proteins which help to open the double helix for DNA synthesis are

DNA topoisomerase
single stranded binding proteins
ligase
DNA helicases

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DNA Structure and Replication
The role of primase is to

synthesize an RNA primer to begin the elongation process
dismantle RNA primer
cleave and unwinds short sections of DNA ahead of the replication fork
proofread base pairing

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DNA Structure and Replication
The chromosomal DNA complexes with

three types of histone as H1, H2A and H4
two types of histone as H1 and H4
four types of histone as H1, H2A, H3 and H4
five types of histone as H1, H2A, H2B, H3 and H4

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DNA Structure and Replication
In DNA, guanine pairs with

Uracil
Adenine
Cytosine
Thymine

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