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DNA Structure and Replication

DNA Structure and Replication
What is the main damaging effect of UV radiation on DNA?

Formation of thymine dimers
Dehydration
Depurination
Single strand break

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

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DNA Structure and Replication
Number of times the two DNA strands are interwined in circular DNA and is known as

helix frequency
linking number
none of these
twisting number

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DNA Structure and Replication
An important difference between eukaryotic and prokaryotic DNA replication is

RNA primers are not required in eukaryotes
more DNA polymerases are found in eukaryotes
eukaryotic DNA polymerases are faster
multiple origins of replication in eukaryotes

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DNA Structure and Replication
Who's X-ray work aided Watson and Crick in their discovery of the double helix?

W.H. Bragg
L. Pauling
R. Franklin
Leaderberg

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DNA Structure and Replication
The site on a bacterial chromosome that marks the initiation point for chromosome replication is called

a promoter
Pro
Ori
an initiation codon

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