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DNA Structure and Replication

DNA Structure and Replication
The enzyme responsible for breaking the hydrogen bonds, and thus separating the DNA strands during DNA synthesis is

DNA polymerase
helicase
strandase
none of these

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

single stranded binding proteins
DNA topoisomerase
ligase
DNA helicases

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DNA Structure and Replication
In DNA, guanine pairs with

Thymine
Uracil
Adenine
Cytosine

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DNA Structure and Replication
The chromosomal DNA complexes with

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

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DNA Structure and Replication
The RNA primers used to initiate replication in E. coli

are joined together by DNA ligase
result in Okazaki fragments on leading strand
are removed by helicase + ATP
are removed by Pol I

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DNA Structure and Replication
The role of primase is to

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

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