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DNA Structure and Replication

DNA Structure and Replication
Each replication bubbles consists of

3 replication forks
4 replication forks
2 replication forks
1 replication forks

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DNA Structure and Replication
Proteins involved in opening a replication bubble are

ligase
DNA helicases
DNA topoisomerase
single stranded binding proteins

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DNA Structure and Replication
In DNA double helix, the two DNA chains are held together by

None of these
hydrogen bonds between the pair of bases
covalent bonds between the pair of bases
ionic bonds between the pair of 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
What is the range of melting point temperatures (Tm) for most DNA molecules?

50 to 60°C
80 to l00°C
70 to 90°C
60 to 80°C

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DNA Structure and Replication
In DNA replication, one new strand is synthesized complementary to an old (parent) strand and is referred as

semiconservative
antiparallel
discontinuous
mutational

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MORE MCQ ON DNA Structure and Replication

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