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DNA Structure and Replication

DNA Structure and Replication
Enzymes, responsible for unraveling short segments of DNA is

DNA ligase
helicase
DNA polymerase
primase

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DNA Structure and Replication
What does ligase do during replication of DNA?

Makes copies of mRNA from DNA
Digests mRNA when it is no longer needed
Synthesizes the lagging strand
Joins nicks in DNA strands

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DNA Structure and Replication
Which of the following species lack a 'classical' histone H1?

Xenopus laevis
Saccharomyces cerevisiae
Strongylocentrotus purpuratus
Arabidopsis thaliana

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DNA Structure and Replication
DNA replication results in

two DNA molecules such that each one contains a strand of the original
one new DNA molecules 1 old molecule
two completely new DNA molecules
one new molecule of RNA

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DNA Structure and Replication
30 nm wide helix with five or six nucleosomes per helix is known as

halonoid
none of these
kinoplast
solenoid

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DNA Structure and Replication
Without telomerase, what would happen to the ends of chromosomes after each round of replication?

Chromosomes would become progressively shorter
None of these
Nothing would happen
Chromosomes would get longer

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