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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

protamines
purines
pyrimidines
All of these

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DNA Structure and Replication
Automated DNA sequencing uses the chain termination method

but with an oligonucleotide primer labeled with a fluorescent dye
either (b) or (c)
with no primer
but with a polynucleotide primer labeled with a fluorescent dye

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DNA Structure and Replication
Which of the following is an active site on its single polypeptide chain for DNA Polymerase I?

5' → 3' exonuclease
5' → 3' polymerase
3' → 5' exonuclease
All of these

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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
Nothing would happen
Chromosomes would get longer
None of these

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

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DNA Structure and Replication
DNA gyrase in E. coli

can be inhibited with antibiotics
adds positive supercoils to chromosomal DNA
performs the same function as helicase in eukaryotes
is required only at the oriC site

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