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DNA Structure and Replication

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

DNA topoisomerase
ligase
single stranded binding proteins
DNA helicases

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

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

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

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

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DNA Structure and Replication
What is the approximate percentage of repetitive DNA sequences in human DNA?

30 to 40%
40 to 50%
20 to 30%
10 to 20%

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DNA Structure and Replication
Which of the following enzyme adds complementary bases during replication?

Helicase
Synthesase
Polymerase
Replicase

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DNA Structure and Replication
The overall conclusion of the Hershey-Chase experiment was that

DNA was responsible for heredity
phage DNA was similar to bacterial DNA
proteins and DNA were responsible for heredity
the ratio of Adenine to thymine was always the same

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