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DNA Structure and Replication

DNA Structure and Replication
In sperm heads, DNA is particularly highly condensed and the histones are replaced with small basic protein called

purines
All of these
protamines
pyrimidines

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

strandase
DNA polymerase
helicase
none of these

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DNA Structure and Replication
DNA replication results in

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

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DNA Structure and Replication
DNA with a G-C content of 50% will melt at approximately

60°C
100 °C
90 °C
70 °C

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DNA Structure and Replication
The replication of a linear DNA molecule in a eukaryotic chromosome creates a problem which is reported to be sorted out by

using enzyme called telomerase
using RNA as a template
shortening of the double stranded replicated portion
None of these

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

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

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